Replacement Parts List

9.Fast-Response Temperature Sensor Module Replacement

a)Shut-off electrical power to the boiler.

b)Remove control cover screws and open control compartment.

c)Disconnect wiring to the board.

d)Carefully pull out the control board from the nylon pin supports.

e)Reverse above procedure to re-install.

10.Fast-Response Temperature Sensor Probe Replacement

a)Shut-off electrical power to the boiler.

b)Shut-off water supply to the boiler and open drain valve to remove water to the sensor probe level.

c)Remove control cover screws and open control compartment.

d)Disconnect wire leads from control board.

e)Remove upper access panel.

f)Remove sensor probe from in/out header.

g)Reverse above procedure to re-install.

11.Circulator Replacement

a)Shut-off electrical power to the boiler.

b)Shut-off water supply and open drain valve to remove water in the piping at the pump level.

CAUTION: To avoid damage to electrical components keep water from getting into the control compartments and gas valve.

c)Disconnect wiring and conduit connections to the pump.

d)Disconnect the bypass tube connections to the inlet flange.

e)Remove the nuts and bolts at the inlet and outlet flanges. Remove old gaskets.

f)Remove the pump.

g)Reverse the above procedure to re-install. Use new gaskets and make sure they are seated properly when tightening the nuts and bolts.

12.2-Stage Controller (Models 90, 135 & 180)

a)Shut-off electrical power to the boiler.

b)Remove control cover screws and open con- trol compartment.

c)The control is factory set at 160°F. To adjust to another setting, use a small screw driver

and turn dial clockwise	to lower the
temperature or counter-clockwise		to
raise the setting.

d)To replace the stage controller, disconnect the wiring connections.

e)Remove screws (2) holding the staged controller.

f)Remove upper access panel.

g)Remove the wedge or retaining clip holding the sensing bulb in the control well in the in/ out header.

h)Pull out the sensing bulb carefully from the control well.

i)Remove the stage control with capillary from unit.

j)Reverse above procedure to re-install.

NOTE: To supply the correct part it is important that you supply the model number, serial number and type of gas when applicable.

Any part returned for replacement under standard company warranties must be properly tagged with Raypak return parts tag, completely filled in with the heater serial number, model number etc., and shipped to Raypak freight prepaid.

If determined defective by Raypak and within war- ranty, the part will be returned in kind or equal substitu- tion, freight collect. Credit will not be issued.

RAYPAK, INC.

2151 Eastman Avenue

Oxnard, CA 93030