Vi-Maintenance - Lennox ZHA Series Unit Information

VI-MAINTENANCE

The unit should be inspected once a year by a qualified ser­
vice technician.
WARNING
Electric shock hazard. Can cause
injury or death. Before attempting to
perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.
CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dan­
gerous operation. Verify proper operation after ser­
vicing.
IMPORTANT
The Clean Air Act of 1990 bans the intentional vent­
ing of refrigerant (CFC's and HCFC's) as of July 1,
1992. Approved methods of recovery, recycling or re­
claiming must be followed. Fines and/or incarcera­
tion may be levied for non-compliance.
A-Filters
Units are equipped with 20 X 24 X 2" temporary filters
which must be replaced prior to building occupation. Re­
fer to local codes or appropriate jurisdiction for approved
filters.
To change filters, open filter access panel on back side of
unit. See figure 13. Lift filter stop to remove filters. See fig­
ure 14.
WARNING
Units are shipped from the factory with temporary fil­
ters. Replace filters before building is occupied.
Damage to unit could result if filters are not replaced
with approved filters. Refer to appropriate codes.
Approved filters should be checked monthly and replaced
when necessary. Take note of air flow direction marking on
filter frame when reinstalling filters. See figure 14.
NOTE-Filters must be U.L.C. certified or equivalent for use
in Canada.
FILTER ACCESS PANEL
REMOVE FILTERS
SLIDE FILTER STOP UP
TO REMOVE FILTERS
B-Compressor
If Interlink compressor replacement is necessary, call
1-800-453-6669.
IMPORTANT
Some scroll compressors have an internal vacuum
protector that will unload scrolls when suction
pressure goes below 20 psig. A hissing sound will
be heard when the compressor is running un­
loaded. Protector will reset when low pressure in
system rises above 40 psig. DO NOT REPLACE
COMPRESSOR.
C-Lubrication
All motors are lubricated at the factory. No further lubrica­
tion is required.
Page 29
BACK OF UNIT
LIFT UP AND PULL
OUT (TOOLLESS)
FIGURE 13
FIGURE 14