OPERATION AND INSTALLATION MANUAL For Models: 700DDPOOL 1200DDPOOL 1000RHC 1000RHCAC NOTE: ALTHOUGH SOME MODELS DIFFER IN OPERATION, THE BASIC STEPS ARE SIMILAR. CAUTION Before installation, careful consideration must be given to how the system will operate if connected to any other piece of mechanical equipment, i.e. a forced air furnace or air handler, operating at a higher static.
Table of Contents Introduction Introduction .....................................................................2 A Heat Recovery Ventilator (HRV) is designed to provide fresh air into a building while exhausting an equal amount of stale air. During the winter months, the incoming cold fresh air is warmed by utilizing the heat recovered from the stale air before it is exhausted to the outdoors.
Model 700DD POOL SPECIFICATIONS AIRFLOWS (Each Air Stream) AIRFLOW L/s (CFM) 423 (900) MOTORS Two PSC, 3 speed single shafted, 120 VAC, 2.75 Amps each (5.5 total on high speed). HP - 1/10, 1625 RPM. Watts - total on high speed - 648. FILTERS Washable air filters in exhaust and supply air streams. BLOWERS Centrifugal type rated at 700 cfm (329 L/s) free air delivery. Each air stream has one single shafted motor driving a centrifugal blower. 378 (800) 329 (700) 5.
Model 1200DD POOL SPECIFICATIONS DIMENSIONS 1200DDPOOL SUPPLY AIR FROM OUTSIDE 613 (1300) 566 (1200) 8.1 HIGH 518 (1100) 378 (800) 7.1 LOW LOW SPEED 282 (600) 25 (.1) 50 (.2) 75 (.3) 100 (.4) 125 (.5) 150 (.6) 175 (.7) EXTERNAL STATIC PRESSURE IN PASCALS (in. W.C.
Model 1000RHC and Model 1000RHCAC SPECIFICATIONS PERFORMANCE CORES Modular (3 section) patented aluminum heat recovery cores arranged for high efficiency cross-flow ventilation. Meets the flame spread and smoke developed classifications of the National Building Code and NFPA 90A (1993 Edition). MOTORS Two PSC, 3 speed double shafted, 120 VAC, 3.95 Amps each (7.9 total on high speed). HP - 1/4, 1625 RPM. Watts - total on high speed - 848. FILTERS Washable air filters in exhaust and supply air streams.
Sizing your Pool Heat Recovery Ventilator Determining ventilation requirements for Indoor Pool enclosures Moisture removal capabilities In addition to the amount of air being exchanged, moisture removal depends largely on the moisture content of both the inside and outside air. The trends below outline these principles. There are two primary reasons to ventilate an indoor pool enclosure. One is to provide effective and efficient control of harmful humidity levels.
Calculation Note: As a general rule, if the water temperature is maintained at 80˚F and the pool room air temperature is maintained at 82˚F, use a factor of 1 cfm/sq ft of pool surface or .5 cfm/sq ft of room area (whichever is greater) to determine amount of ventilation required.
TABLE 1 Evaporation Rate Indoor Relative Humidity 40% 50% 60% 40% 50% 60% 40% 50% 60% 40% 50% 60% 40% 50% 60% 40% 50% 60% Evaporation Rate lb/(sq. ft-hr.) 68 0.069 0.063 0.056 0.079 0.073 0.066 0.090 0.084 0.077 0.102 0.095 0.089 0.115 0.108 0.102 0.129 0.122 0.116 70 0.068 0.060 0.053 0.078 0.070 0.063 0.088 0.081 0.074 0.100 0.093 0.086 0.113 0.106 0.099 0.127 0.120 0.113 72 0.065 0.058 0.050 0.075 0.068 0.060 0.086 0.079 0.071 0.
TABLE 2 Flowrate Factor Indoor Relative Humidity 40% 50% 60% 40% 50% 60% 40% 50% 60% 40% 50% 60% 40% 50% 60% 40% 50% 60% Flowrate Factor (cfa-hr./lb.) -30 39.70 31.50 26.10 35.70 28.30 23.40 32.10 25.50 21.10 29.00 23.00 19.00 26.10 20.70 17.20 23.60 -25 40.20 31.80 26.20 36.10 28.50 23.60 32.40 25.70 21.20 29.20 23.10 19.10 26.30 20.90 17.20 23.80 18.80 15.60 -20 40.80 32.10 26.50 36.50 28.80 23.80 32.80 25.90 21.40 29.50 23.30 19.
Installation Diagrams EXPOSED WALL EXPOSED WALL EXPOSED WALL Blanket exposed windows with fresh dry air Main Stale Air Intake EXPOSED WALL HRV Min. 10’-0" Always attempt to minimize short circuiting of air streams, (supply fresh air on one side of room and exhaust stale air from opposite side of room).
EXPOSED WALL INTERIOR WALL EXPOSED WALL Blanket exposed windows with fresh dry air Stale Air Intake EXPOSED WALL HRV Min. 10’-0" Always attempt to minimize short circuiting of air streams, (supply fresh air on one side of room and exhaust stale air from opposite side of room).
Location for Mounting The Ductwork System The HRV must be located in a heated space where the surrounding air temperature does not fall below 60˚F (16˚C). The unit must be mounted level (horizontal) to obtain proper drainage or water from the heat exchange element and drip pans. The warranty will be void if these conditions are not met. A properly designed ducting system will allow the HRV to operate at its maximum efficiency.
Outside Weatherhoods Stale Air Return System The weatherhoods must have built-in “bird” screen with 1/4 in (6.35 mm) minimum mesh to prevent birds and rodents from entering into the ductwork. Do not use smaller mesh as it will be very susceptible to plugging up. Gravity dampers at the vents must not be used as they will restrict air flow and often “seize up”. The preferred location of the outside weatherhoods is: • no less than 10 ft.
Fresh Air Supply System The fresh air supply ductwork from the HRV may be directly connected to the return air duct of the forced air system. Check the air flow balance of the HRV with the air handler blower both “ON” and “OFF” to determine that it does not imbalance the HRV more than 10%.
Various Installation Types NOTE: Figure 7A Saddle Installation When installing your HRV flexible duct connectors should be installed between the HRV and the galvanized duct work. Vibration Isolators (Supplied by others) Threaded rod and U channel (Supplied by others) Hang unit with suspended rods and "U" channel members. Figure 7B Curb Mounted Curb is wood or metal (Supplied by others) Mount unit on wooden or metal curb assembly.
Electrical Connections Automatic Self Test of Defrost Systems It is recommended that a licensed electrician make all electrical connections. It is very important that the unit be properly grounded. It is recommended that a separate 15 amp/120 volt circuit be used. If confirmation of the defrost system is needed, complete the following steps. 1. Disconnect power to the unit and open access/ maintenance doors.
Operation of the HRV These Recirculating Models of HRV's will provide fresh clean air without sacrificing the savings of your energy conserving home. When outdoor air is required for pool room dehumidification, the aluminum cores of the HRV provide effective and efficient heat recovery exchange. Whether operating as an HRV or in recirculation mode, the energy efficient PSC blower motors provide reliable and cost effective operation. The exhaust fan to the outside is shut off during this time.
Ducting Requirements & Mode of Operation Ventilation Mode Defrost Mode In ventilation mode, both motors are running and air is being exchanged with the outside through the supply and exhaust ducts. In defrost mode both the supply and exhaust motors run to draw air through the heat exchange cores. This mode is automatic and does not require field adjustments. Defrost light on side of cabinet illuminates to indicate defrost operation.
Speed Selection and Controls Air Conditioning (DX) Coil Model 1000RHCAC Only These recirculation models are equipped with a 3 speed control, low medium and high, (Note 1000RHC/RHCAC must be set to high speed when air conditioning is required), as well as a lighted on/off switch and a low voltage terminal strip. The low voltage terminal strip is used to connect the supplied dehumidistat.
Pitot Tube Air Flow Balancing It is necessary to have balanced air flows in an HRV. The volume of air brought in from the outside must equal the volume of air exhausted by the unit.
Service/Maintenance Servicing your HRV on a regular schedule will result in optimum operating efficiencies and prolonged life of the equipment. HRV Core The heat exchange core is accessible through the front service door. Special care and attention should be given to this component as the edges may be sharp, and the core itself susceptible to damage if dropped. Due to numerous applications in which this equipment can be installed, it is difficult to predict servicing intervals.
FILTERS DUCT WORK Open front service door to access the filters located in both supply and exhaust air streams. Note to remove and install filters, it may be easier to first remove the core(s). See CORE. It is a good idea to inspect ducting, outside weather hoods (wall caps), and grilles for blockage and dirt buildup, at least every six months. The filters are designed to stop large particles from entering in the core. The filters are fastened in place by a metal spring rod.
Troubleshooting Your HRV System SYMPTOM CAUSE SOLUTION Poor Air Flows • 1/4” (6 mm) mesh on the outside hoods is plugged • filters plugged • core obstructed • house grilles closed or blocked • dampers are closed if installed • poor power supply at site • ductwork is restricting HRV • improper speed control setting • HRV airflow improperly balanced • clean exterior hoods or vents • remove and clean filter • remove and clean core • check and open grilles • open and adjust dampers • have electrician check
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COMMERCIAL LIFEBREATH® HEAT RECOVERY VENTILATORS • Two Year Limited Warranty • 15 Year Core Warranty NUTECH BRANDS INC.® (NUTECH) warrants to the purchaser of the Commercial LIFEBREATH® model and accessories referred to below, to be free from manufacturing defects.
