UHA S
TANDARD
U
NIT
H
EATER
I
NSTALLATION
O
PERATION
AND
S
ERVICE
M
ANUAL
34 of 51
Heat Exchan
g
er
Make s
u
re there are no cracks.
See Page 19, Section 9
.
Make s
u
re there is no sagging, bending or distortion.
Clean or replace as req
u
ired.
Gas Line and Shut-off
Valves
Check for gas leaks.
See Page 19, Section 9
.
Burner Observation
Window
Make s
u
re it is clean and free of cracks or holes.
Clean and replace as req
u
ired.
Flue Blower Scroll, Wheel
and Motor
Compressed air or a vac
uu
m cleaner may be
u
sed to clean d
u
st and dirt.
Inshot Burners and
Orifices
Clear of obstr
u
ctions (even spider
w
ebs
w
ill ca
u
se problems).
Caref
u
lly remove any d
u
st and debris from the b
u
rner.
Direct-Spark I
g
niter
Replace if there are cracked ceramics, excessive carbon resid
u
e, or erosion
of the electrode.
The electrode gap sho
u
ld be 1/8" (3.2 mm).
Thermostat
There sho
u
ld be no exposed
w
ire or damage to the device or
w
iring.
See Page 21, Section 10
.
Suspension Points
Make s
u
re the heater is hanging sec
u
rely.
Look for signs of
w
ear on the s
u
spension materials or ceiling.
See Page 10, Figure 5
.
Silicone Tubin
g
Ens
u
re tight, sec
u
re fit on all press
u
re fittings at press
u
re s
w
itch,
b
u
rner partition, and blo
w
er o
u
tlet.
Gas Valve
Verify that cap covering press
u
re reg
u
lator adj
u
stment scre
w
is sec
u
re and
has not been tampered
w
ith.
Verify all
w
iring connections.
Condensate Drain
(when installed)
Fl
u
sh drain and clear any obstr
u
ctions.
Wall Ta
g
If a
w
all tag is present, make s
u
re it is legible and acc
u
rate. Please contact
Roberts-Gordon LLC or yo
u
r ROBERTS GORDON
®
independent distrib
u
tor if
yo
u
need a
w
all tag.
See Page 5, Section 2.1
.
