Domestic Hot Water Module
APPLICATION
The Domestic Hot Water (DHW) Module, when connected to
the 32003971-003 General Purpose Temperature Sensor,
communicates domestic hot water usage information from
an indirect tank to the Resideo AquaReset
Electronic Aquastats®, including the L7224/48, via the
™
EnviraCOM
3-wire bus to optimize boiler efficiency. The
DHW Module enables the Aquastat, when operating under
outdoor reset command, to prioritize domestic hot water
requests by driving the boiler temperature to High Limit (HL)
and ensuring an ample hot water supply. When the domestic
hot water request is complete, the DHW Module informs the
Aquastat that it can revert back to the outdoor temperature
curve for boiler temperature setting.
SPECIFICATIONS
Electrical Ratings:
Voltage: 24 Vac, 60 Hz.
Environmental Ratings:
Temperature: -30°F to +150° F (-34° C to +66° C)
Humidity: 0 to 95% relative humidity, non-condensing.
Replacement Parts:
198799Z Temperature Sensor
32003971-003 Temperature Sensor Kit includes mounting
hardware
FEATURES
• Prioritizes domestic hot water requests
• Informs when the domestic hot water request is complete
• Easy push wire terminals that provide a secure lock with
no need to screw in wires.
• Simple low-voltage, 5-wire installation (3 EnviraCOM,
2 temperature sensor)
• EnviraCOM
INSTALLATION
When installing this product...
1. Read these instructions carefully. Failure to follow
2. Check the ratings given in the instructions and marked
™
enabled
3. The installer must be a trained, experienced service
4. After installation is complete, check out product opera-
5. The Domestic Hot Water (DHW) Module can be wall-
6. The holes are sized for the #6 sheet metal screws.
7. Precise leveling of the product is not required.
8. Mount the 32003971-003 Temperature Sensor on the
NOTE:
INSTALLATION INSTRUCTIONS
™
Enabled
them could damage the product or cause a hazardous
condition.
on the product to make sure the product is suitable for
the application.
technician.
tion as provided in these instructions.
mounted in any orientation desired or dictated by the
surroundings.
tank outlet pipe within 2 inches from the tank using the
wire straps included in the sensor kit. See Fig. 1.
To insure proper operation of the DHW Module, con-
nect the sensor as close as possible to the water
tank. The farther from the tank the sensor is located,
the slower the DHW may react to a domestic hot
water draw. Insulating the sensor on the pipe may
improve overall functionality of the DHW Module
and overall system performance. For more informa-
tion on the temperature sensor, see Domestic Hot
Water Module Sensor Installation Instructions, Form
#69-2344.
69-2343EFS-02