Manual

ManualsBrandsBradford White ManualsCooling & Air Quality25 Gallon - 76,000 BTU High Performance Atmospheric Vent Residential Water Heater (LP Gas)

INTEGRATED MIXING DEVICE (IMD)

INSTALLATION AND OPERATING INSTRUCTION MANUAL

For your family’s comfort, safety and convenience, it is recommended this IMD be

installed and serviced by a plumbing professional.

CAUTION

If sweat fittings are to be used, DO NOT apply heat to the fittings on top of the

water heater. Sweat the tubing to the adapter before fitting the adapter to the

water connections. It is necessary that heat is not applied to the fittings to ensure

appropriate operation.

This manual will explain in detail the installation and maintenance of the integrated mixing device.

We require that you carefully read this manual and refer to it if questions arise.

PRE-INSTALLATION

The following steps should be taken to ensure proper conditions for operation:

Note all site parameters (pressure, temperature, etc.) and check against the integrated mixing

device (IMD) specifications listed in Table 1. All specifications must be met prior to installing the

IMD.

This IMD MUST NOT be subjected to heat during installation as this may damage the internal

parts.

The valve MUST NOT be allowed to freeze. If the IMD is installed in a potentially freezing

situation, suitable insulation must be fitted to prevent damage.

DO NOT use excess thread sealant (in liquid, tape or other form) as this may cause the IMD to

fail. The installer must ensure that thread sealant does not get into the internal parts.

In order to install this IMD on a unit with a blower mounted on top, it is necessary to remove the

blower prior to installation and replace the blower after installation of this IMD.

If the water heater is gas-fired, the IMD must be installed before the draft hood.

This manual is meant to be used in conjunction with the installation and operation manual

(owners manual) for the water heater.

Toxic chemicals, such as used for boiler treatment, shall not be introduced into IMD used for

space heating. This IMD may never be connected to any existing heating system or

component(s) previously used with a non-potable water heating system.

Leave a copy of this instruction manual with the water heater for future reference.

Recommend to the user that the IMD be checked annually to ensure its continued function.

Page 1 238-47870-00C 08/09

Summary of content (8 pages)

PAGE 1
INTEGRATED MIXING DEVICE (IMD) INSTALLATION AND OPERATING INSTRUCTION MANUAL For your family’s comfort, safety and convenience, it is recommended this IMD be installed and serviced by a plumbing professional. This manual will explain in detail the installation and maintenance of the integrated mixing device. We require that you carefully read this manual and refer to it if questions arise.
PAGE 2
INTEGRATED MIXING DEVICE - IMD SPECIFICATIONS Table 1 Mixed water supply temperature range 100 - 145°F (38 - 63°C) Water heater outlet temperature range 100 - 180°F (38 - 82°C) Cold water inlet temperature range 33 - 80°F (1 - 27°C) Device temperature stability (nominal) ± 3°F (± 1.7°C) at 3 - 5 gpm (see note 1) ± 5°F (± 3.
PAGE 3
Remove all components from the package and check that all required components are included. The required components are: mixing device, cold water tee, flexible metal connector and thermostrip (see Figure 1). Mixing device Cold water tee This kit may have two flexible connectors provided for water heaters with top water course connections at 8 inch and 11 inch spacing. Use the appropriate flexible metal connector.
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WATER CONNECTIONS CONTINUED... ¾" NPT Cold water inlet The cold water tee is equipped with a ¼” NPT optional cold water outlet that draws cold water prior to the water heater (see Figure 3). This outlet may be used to connect cold water to refrigerator ice makers or other low flow applications. Cold water outlet to mixing device ¼" NPT Optional cold water outlet Figure 3 Cold water Tee ¾" NPT Cold water outlet to water heater ASSEMBLY PROCEDURE 1.
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ASSEMBLY PROCEDURE CONTINUED... 2. Install the cold water tee onto the cold water inlet of the water heater. If installing on a water heater with 1" inlet fitting, use 1" NPT to ¾" NPT brass reducer bushing and brass nipples. Tighten until leak tight and facing the front of the water heater as shown in Figure 5. Cold water tee Water heater cold water inlet Front of water heater Figure 5 Installing Cold Water Tee 3. Install the mixing device onto the hot water outlet of the water heater.
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ASSEMBLY PROCEDURE CONTINUED... 4. Install the flexible metal connector to the mixing device and cold water tee as shown in Figure 7. Tighten flare connectors until leak tight. Flare connector Mixing device Flexible metal connector Cold water tee Figure 7 Installing Flexible Metal Connector At this time the IMD should be leak tight. Continue installation of potable water system as indicated in the installation and operation instruction manual supplied with the water heater.
PAGE 7
IMD CARE AND MAINTENANCE WARNING Hotter water increases the risk of scald injury. Scalding may occur within 5 seconds at a setting of 140°F (60°C). Water temperature over 125°F (52°C) can cause burns or death from scalds. Children, disabled and the elderly are at highest risks of being scalded. Please feel the water before bathing or showering. WARNING SCALDING This water heater can deliver scalding temperature water at any faucet in the system. Be careful whenever using hot water to avoid scalding injury.
PAGE 8
TEMPERATURE ADJUSTMENT CONTINUED... 1. The Mixed Water Supply Temperature may require adjustment. The IMD is set at approximately 120°F when the arrow on the hand wheel and the arrow on the casting are aligned. a. To Increase Mixed Water Supply Temperature: Depress and rotate the hand wheel counter clockwise until the desired set point is reached (see Figure 9). Refer to thermostrip temperature reading for desired set point (hot water must be flowing at a minimum of 1 gpm to accurately read thermostrip).