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PLUS Indirect Water Heaters
Ultra PLUS 40/60/80 - GOLD Plus 30/40/60/80 - PLUS 100/120
Drywell and/or O-Ring Replacement
O-Ring Replacement
Kit Part Number: 635-600-150
Parts List
1. Rubber O-Ring
2. Hex Key Tool
3. Thread Sealant (Loctite 680 - Packet)
WARNING
Indicates a potentially hazardous situation which, if
ignored, can result in serious injury or substantial
property damage.
WARNING
Failure to follow instructions below can result in severe personal injury or damage if ignored.
WARNING
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.
WARNING
(Refer to Manual for draining).
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.
Make sure capillary tube is not kinked or damaged. A defective capillary tube can cause
WARNING
thermostat to fail, resulting in a situation that can result in severe personal injury or death.
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.
®
NOTICE
NOTICE
Indicates special instructions on installation, operation or
maintenance, which are important to equipment but not
related to personal injury hazards.
Drywell Replacement
Kit Part Number: See chart on page 4.
Parts List
1. Drywell
2. Hex Key Tool
3. Thread Sealant (Loctite 680 - Packet)
(Refer to Manual for draining)
IWH-A020-A/0409
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Summary of Contents for Well-mcLain PLUS Series
- Page 1 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.
- Page 2 Replacement Drywell Installation A rubber or copper O-Ring is NOT required NOTICE on the replacement of the drywell. 1. When replacing the drywell ensure the internal 4. Re-insert the thermostat-sensing bulb into the drywell. threads of the coupling are clean and free of debris. Ensure the sensing bulb is inserted fully to the bottom of the drywell.
- Page 3 (required if replacing O-ring, not required if replacing drywell) (removed, no longer available) IWH-A020-A/0409...
- Page 4 New Drywell Installation NOTICE When installing a new drywell do not apply rubber or copper O-ring. 1. Ensure the threaded area of the coupling and drywell are clean of pipe dope and debris. Remove the old O-ring. 2. Apply a generous amount of thread sealant (supplied in kit) completely around all the drywell threads and rethread the drywell into the tank.