Heater parts removal and installation, Service guide for all portable dryers – Grain Systems PNEG-573 User Manual

Page 54

HEATER PARTS REMOVAL AND INSTALLATION

b. Use a dependable brand of
high temperature pipe caulking
compound when assembling
gas

gas

gasconnections

connections

connections. Apply only a

light coating onto male threaded
end of fittings.

c. Solenoid valves

Solenoid valves

Solenoid valves and gas

gas

regulators

regulators are directional and
must be properly installed. Do not
attempt to connect gas solenoid
valve by applying force to the
valve core stem as it may ruin the
unit.

d. Make sure all electrical wires

electrical wires

are properly connected. Refer to
wiring diagrams.

SERVICE GUIDE FOR ALL PORTABLE DRYERS

b. DISCONNECT gas solenoid

gas solenoid

valve coils

valve coils. Be sure to MARK
which one goes where.

c. LIFT pipe

pipe

pipe (with orifice, sole

orifice, sole

noid valve and other parts

noid valve and other parts at-
tached),
straight up and REMOVE from
fan/heater housing

fan/heater housing

fan/heater housing. Orifice

Orifice

Orifice and

other parts can now be removed
from pipe train

pipe train

pipe train, if desired.

5. Reassemble

Reassemble

Reassemble: Reverse the disas-
sembly procedure and CHECK
the following:

a. Make sure all parts are thor-
oughly cleaned and open.

Most of the heater parts can be removed
by simply identifying any attached wir-

wir-

ing

ing, and then DISCONNECTING the
obvious mounting parts.

1. Flame sensor

Flame sensor

Flame sensor: DISCONNECT
the wire connector

wire connector

wire connector, and UN-

SCREW the flame sensor

flame sensor

flame sensor out

of its mount

mount

mounting bracket

ing bracket

ing bracket.

2. Gas Solenoid valve coil(s)

Gas Solenoid valve coil(s)

Gas Solenoid valve coil(s):
UNSNAP either the plastic
cap, or the metal clip on the gas

gas

valve

valve, and SLIDE the housing

housing

and coil

coil

coil off the valve stem and

body. Do not energize the coil
when it is removed, as the coil
may become damaged due to
excessive current flow.

3. Regulator and gas solenoid

Regulator and gas solenoid

Regulator and gas solenoid
valve(s)

valve(s)

valve(s): The gas regulator

gas regulator

gas regulator and

solenoid valve(s)

solenoid valve(s) are directional
and must be CONNECTED as in
dicated by the markings near the
port openings. Make sure gas is
SHUTOFF and purged from the
system before removing parts.

Note: When installing a liquid gas so-

liquid gas so-

lenoid valve

lenoid valve on LP models, do not
over tighten the connection into the
inlet side, as the inlet orifice

inlet orifice

inlet orifice may

become partially blocked.

4. Main Gas Orifice:

Main Gas Orifice:

Main Gas Orifice: With fuel
SHUTOFF and gas purged from
system, proceed as follows:

a. DISCONNECT the plumbing

plumbing

support brackets

support brackets from the pipe

pipe

train

train.

11111

33333

22222

44444

55555

This view of the dryer heater shows 1-high pressure gas solenoid, 2-low

pressure gas solenoid, 3-gas solenoid valves, 4-gas regulator and 5-

vaporizer adjustment bracket