Rev 8/2014
PrecisionTemp, Inc • 11 Sunnybrook Drive • Cincinnati, Ohio, 45237 • 1-800-934-9690 •
fax 513-641-0733 59
SB-18 PT-56 Tank Assembly Change Procedure
Model:
PT-56
Other Service documents required:
SM56-13
Testing the PT56
Tools Required:
Small adjustable wrench
Large adjustable wrench
Phillips screwdriver
13/16 open end wrench
11/16” open end wrench
¾” open end wrench
2 pipe wrenches
11/32” socket
Needle nose pliers
8.
Turn off the water supply to the booster water inlet.
9.
Now drain the water from the booster heater. Before proceeding provide a
method of draining about 3.5 gallons of water. Loosen a connection at the
booster inlet. Very little water will drain until the next step. Loosen the two
compression fittings PF 1547 (see figure TS56-2) and the booster will drain from
the loose fitting at the booster inlet.
10.
Remove the T&P valve, including the extension fitting.
11.
Disconnect the inlet and outlet water lines. Remove the inlet and outlet pipes
from the bottom of the unit leading to the tank.
12.
Remove the one screw holding the power supply bracket BK 1457 to the left side
of shroud AS 1462 using the phillips screwdriver. Remove the ten (10) screws
attaching the case shroud AS 1462 to the base CS 1455. Remove the shroud.
13.
Open the two compression fittings PF 1547 from the step above.
14.
Using an 11/32” socket remove the three nuts FS 1492 holding the tank to the
base and lift the tank and pump assembly from the base. The pump electrical
cord will still be connected to the power supply bracket.
15.
Open the pump electrical cover by removing the one cover screw. Inside remove
the two wire nut screws and separate the wires. Unscrew and remove the green
ground wire. Use needle nose pliers to remove the strain relief for the harness.
16.
Put a pipe wrench on the hex at the tank fitting going to the pump and unscrew
the tank from the pump and piping. If the ¾” close nipple remains in the tank
use the supplied part in the new tank.
17.
Install the new tank assembly AS 1679 reversing steps 9, 8, 7, 6, 5, 4, and 3 and
tighten the fittings at the booster inlet and outlet. Remember to clean all NPT
fittings and apply teflon tape to all water threaded fittings.
18.
Turn water ON and open the booster outlet to fill the booster and remove air.
Also, check for water leaks. If necessary, prime the pump (see SM56-12).
19.
Perform a test of the unit using steps 3, 5, and 6 of SM56-13 ‘Testing the PT56’.
