Drywell and/or O-Ring Replacement
PLUS Indirect Water Heaters
O-Ring Replacement
Kit Part Number: 635-600-150
1. Rubber O-Ring
2. Hex Key Tool
3. Thread Sealant (Loctite 680 - Packet)
Parts List
Ultra PLUS 40/60/80 - GOLD Plus 30/40/60/80 - PLUS 100/120
Drywell Replacement
Kit Part Number: See chart on page 4.
1. Drywell
2. Hex Key Tool
3. Thread Sealant (Loctite 680 - Packet)
Parts List
NOTICE
Indicates a potentially hazardous situation which, if
ignored, can result in serious injury or substantial
property damage.
Indicates special instructions on installation, operation or
maintenance, which are important to equipment but not
related to personal injury hazards.
WARNING
Failure to follow instructions below can result in severe personal injury or damage if ignored.
Instructions are for a qualified installer/service technician.
Read all instructions before proceeding.
Follow instructions in proper order.
Removal of the Drywell
1. Shut off the domestic cold water supply valve to the water heater.
2. Close all isolation valves on the primary piping from the boiler to the water heater.
Open the boiler side drain at the water heater to relieve the outer pressure.
3. Open a hot water faucet within the system to relieve any pressure within the inner tank.
Failure to properly relieve pressure on the outer tank can cause potential damage to the inner tank.
4. Locate the drywell on the tank.
For PLUS Series water heaters the drywell is located under the top lid near the thermostat knob.
For Ultra PLUS and GOLD Plus Series water heaters the drywell is accessible by removing the thermostat
cover plate.
5. Remove the thermostat sensing bulb from the drywell.
6. To remove the hexagon head shape drywell requires a 27mm wrench or socket.
7. To remove the round head shape drywell requires the Hex Key Tool (supplied in kit) and a wrench or socket.
(Refer to Manual for draining)
(Refer to Manual for draining).
Make sure capillary tube is not kinked or damaged. A defective capillary tube can cause
thermostat to fail, resulting in a situation that can result in severe personal injury or death.
IWH-A020-A/0409
WARNING
WARNING
WARNING
NOTICE
WARNING
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