Winter / Summer Optional Kit

ManualsBrandsBradford White ManualsHome building and DecorS-SW2-115R6DS

238-47683-00A REV 01/09

INSTALLATION INSTRUCTIONS – WINTER/SUMMER KIT

HYDRONIC HEATING WITH THE SOLAR WATER HEATER

This winter/summer kit provides the necessary components for connections to a boiler. Through the

proper installation of this kit, a boiler can heat the potable water indirectly during the cold season

when the boiler water is normally hot. The potable water can be heated by an electric element during

the warmer months. This increases the boiler efficiency by eliminating the need to heat the boiler

from a cold start during warm months.

It is important that you read and understand these instructions completely prior to installing the kit

components.

Verify that this kit includes the following components:

Label – “To Boiler Return” Label – “From Boiler Supply”

Surface mounted thermostat w/cover Honeywell R845A Switching Relay

ELECTRICAL CONNECTIONS

Before taking any steps to install the kit components, verify that all power is off and that the water

heater is placed properly.

DANGER

Positively assure all electrical connections are unpowered before attempting installation or service of

electrical components or connections of the water heater or building. Lock out all electrical boxes with

padlock once power is turned off.

WARNING

When installed, the water heater must be electrically grounded in accordance with local codes or, in the

absence of local codes, with the National Electrical Code, ANSI/NFPA 70, and /or the CSA C22.1

Electric Code, latest editions.

Failure to properly wire electrical connections to the water heater may result in serious physical harm.

Electrical power may be from more than one source. Make sure all power is off before attempting any

electrical work.

Summary of content (6 pages)

PAGE 1
INSTALLATION INSTRUCTIONS – WINTER/SUMMER KIT HYDRONIC HEATING WITH THE SOLAR WATER HEATER This winter/summer kit provides the necessary components for connections to a boiler. Through the proper installation of this kit, a boiler can heat the potable water indirectly during the cold season when the boiler water is normally hot. The potable water can be heated by an electric element during the warmer months.
PAGE 2
1. Unscrew and open the lower access cover. Lift the insulation and remove the twisted brown wires from the bracket. Keep the wires from interfering and insert the thermostat (with cover) securely in the bracket. The back of the thermostat must be in good contact against the tank wall to accurately sense the temperature. 2. Remove the wire nut from the twisted brown wires and strip the wire ends leaving ¾” of bare wire exposed.
PAGE 3
Figure 2 – Water Heater Illustration and Label Placement Diagram *In models with a single heating element, the element is replaced with a plug. INDIRECT WATER HEATER RATINGS Table 1: Indirect Water Heater Performance in Boiler Application Maximum First Hour Continuous Draw Approximate Boiler Output Rating (Gal/Hr) @ Rating (Gal/Min) @ Needed For Ratings 140 °F 115 °F 140 °F 115 °F MODEL (BTU/hr) Single-wall 60-Gallon 306 456 4.2 6.7 220,000 Double-wall 60-Gallon 210 305 2.6 4.
PAGE 4
POTABLE WATER TEMPERATURE ADJUSTMENT Table 2 details the approximate relationship of water temperature and time with regard to scald injury and may be used as a guide in determining the safest water temperature for your applications. DANGER 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 severe burns or death from scalds.
PAGE 5
Answer: New Rating = 4.2 gal/min x (175,000 BTU/h)/(220,000 BTU/h) = 4.2 gal/min x 0.795 = 3.3 gal/min NOTICE Increasing the boiler heating capacity above the values listed in Table 1 will not increase the rating of the water heater. CAUTION Maximum boiler water supply temperature to the indirect heat exchanger must not exceed 250°F (121°C). 2. Circulator Sizing – Refer to the water heater’s installation manual for the corresponding pressure drop through the coil for the given model.
PAGE 6
INSTRUCTIONS FOR BOILER CONNECTIONS The indirect-fired heater connection labeled “To Boiler Return” should be piped to the boiler return piping as close to the boiler as possible and especially after any flow control or check valves in the space heating return piping. The use of a union and a shut-off valve is recommended. The use of a flow control or check valve is required to prevent back flow through the water heater during operation of the space heating system.