Control Thermostat - Aqua-Hot 400 Series Service Manual

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Service manual (106 pages)

Installation manual (63 pages)

Use and care manual (25 pages)

Table Of Contents

Table of Contents

Control Thermostat Replacement Procedure:

Failure to disconnect all power supplies and/or to allow the

heater to cool before servicing could cause serious damage

or personal injury

1. Ensure that the Aqua-hot has been completely shut

down and all power sources have been disconnected.

Also, because this replacement procedure will involve

the boiler tank and the potential for hot coolant, be sure

the heater has adequately cooled.

2. Drain the antifreeze and water heating solution from

the Aqua-Hot's boiler tank using the drain valve.

3. Disconnect the defective control thermostat's wires by

separating the quick disconnect terminals.

Thermostats

Figure 12

4. Using a 7/8" socket, unscrew the control thermostat

from the Aqua-Hot's boiler tank.

5. Wrap the threads of the replacement control thermostat

with 6 wraps of a thread seal tape.

6. Screw the replacement control thermostat into the port

on the Aqua-Hot's boiler tank and tighten securely with

a 7/8" socket.

7. Connect the replacement control thermostat's wires in

the same configuration as the removed control thermo-

stat's wires.

8. Refill the Aqua-Hot's boiler tank with the antifreeze and

water heating solution.

9. Test the Aqua-Hot for normal operation.