UHD L
OW
P
ROFILE
D
UCT
F
URNACE
I
NSTALLATION
O
PERATION
AND
S
ERVICE
M
ANUAL
26 of 47
SECTION 11: OPERATION AND MAINTENANCE
Read this man
u
al caref
u
lly before installation,
operation, or service of this eq
u
ipment. All
components are accessed via the door sec
u
red by
sheet metal scre
w
s
w
ith gro
u
nding strap. Opening
the door exposes live electrical connections and hot
components.
11.1 Pre-Start-Up Checks
All pre-start-
u
p checks m
u
st be carried o
u
t before
lighting the heater.
Ens
u
re that the heater and all controls are s
u
itable
for the gas, press
u
re and electrical s
u
pply to
w
hich
they are to be connected.
11.1.1 Electrical Checks
1. Check that all site
w
iring is connected in
accordance
w
ith the appropriate
w
iring diagram
on Page 23, Section 10.3
.
11.1.2 Gas Supply
All aspects of the gas installation incl
u
ding the gas
meter m
u
st be inspected, tested for gas tightness
and p
u
rged in accordance
w
ith local and national
codes.
Ens
u
re that the air is f
u
lly p
u
rged from the heater
inlet pipe
u
p to the main gas valve inlet test nipple.
11.1.3 Mechanical Checks
1. Check that the fl
u
e (and air intake for separated
comb
u
stion
u
nits) is installed in accordance
w
ith the instr
u
ctions in this man
u
al and local
reg
u
lations.
See Page 12, Section 7
.
11.2 Be
g
in Start-Up
11.2.1 Before Operatin
g
the Heater
To ens
u
re that all the controls are in safe
w
orking
order, operate the heater for the first time
w
ith the
isolating gas valve t
u
rned off and po
w
er s
u
pply
t
u
rned on.
1. T
u
rn off the isolating gas valve.
2. T
u
rn
u
p the thermostat above room
temperat
u
re. The a
u
tomatic ignition
seq
u
ence
w
ill no
w
begin as described
on Page 27, Figure 15
.
There
w
ill be no ignition of the b
u
rner and locko
u
t
w
ill occ
u
r,
w
hich proves the controls are operating
correctly.
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Edges are sharp.
WARNING
Failure to follow these instructions can result in death, electric shock, injury or property damage.
Burn Hazard
Allow heater to cool
before service.
Tubing may still be hot
after operation.
Explosion Hazard
Turn off gas supply to
heater before service.
DANGER
Electrical Shock Hazard
Disconnect electric
before service.
Heater must be
connected to a properly
grounded electrical
source.
Summary of Contents for UHD 125
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Page 29: ...SECTION 9 GAS PIPING 21 of 47 Figure 14 Gas Connection...
Page 43: ...SECTION 14 TROUBLESHOOTING 35 of 47 14 1 General...
Page 54: ...UHD LOW PROFILE DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 46 of 47...
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