UHA S
TANDARD
U
NIT
H
EATER
I
NSTALLATION
O
PERATION
AND
S
ERVICE
M
ANUAL
46 of 51
15.9.1 Fan Removal and Replacement
*For
u
nits b
u
ilt after J
u
ly 2011.
For
u
nits b
u
ilt before J
u
ly 2011, P/N 90710416.
15.9.2 To Replace the Fan Assembly
To replace the fan assembly, reverse the proced
u
re
sho
w
n above.
• Check that the fan blades are free to rotate
before t
u
rning on the po
w
er to the fan.
• Strictly comply
w
ith the color code of the fan
w
ires to ens
u
re correct operation.
See Page 24,
Section 10.5
w
iring diagram.
• Use only gen
u
ine replacement parts sold and
s
u
pplied by Roberts-Gordon LLC.
15.10 Limit Switches
15.10.1 Removal and Replacement
1. Remove the electrical connections to the
s
w
itch.
2. Unscre
w
the t
w
o scre
w
s sec
u
ring the s
w
itch.
3. Fit a ne
w
s
w
itch
w
ith t
w
o scre
w
s.
4. Reconnect the electrical connections and test
operation.
Description
Part Number
Qty.
Axial Fan UHA[X][S] 150 - 175
90710417*
1
Axial Fan UHA[X][S] 200 - 250
90710417
1
Axial Fan UHA[X][S] 300 - 400
90710416
2
WARNING
Severe Injury Hazard
Turn off gas and electrical supply before
service.
Fan can start automatically at any time.
Failure to follow these instructions can
result in severe injury or product damage.
Remove the screws
and washers.
