Filter
Top Products
Duct Design and Duct Installation Requirements
See Section 10.
Internal Filter in Top Return Installation
When instal ling top-mounted filter inside the furnace, install the fil-
ter clips on the edge of the top duct opening with the wider end of
the clips toward the blower as shown in Figure 32. Clips may be
obtained from your distributor or fabricated from sheet metal
(Figure 33). Insert filterintosideclips firstand push filter backuntil
it is fully engaged into back clip.
Top Mounted Internal Filter
j_
Clip
side-to-side
26 Ga. Galvanized Steel
NOTE: If filters are only suitable for heating application, ad-
vise homeowner that filter size may need to be increased if air
conditioning is added.
Addition Of Air Conditioning
See Section 10.
12. Checks and Adjustments
Startup
NOTE: Refer to startup procedures in the Users Information
Manual.
ELECTRICAL SHOCK, FIRE, OR EXPLOSION
HAZARD.
Failure to follow safety warnings exactly could
result in death, personal injury and/or property
damage.
If any sparks, odors or unusual noises occur,
immediately shut OFF gas and power to furnace.
Check for wiring errors or obstruction to blower.
Gas Supply Pressure
Gas supply pressure should be within minimum and maximum val-
ues listed on rating plate. Pressures are usually set by gas suppli-
ers.
(See LP Gas Conversion Kit instruction manual for furnaces con-
verted to LP gas.)
FIRE OR EXPLOSION HAZARD.
Failure to turn OFF gas at shut off before connecting
manometer could result in death, personal injury
and/or property damage.
Turn OFF gas at shut off before connecting
manometer.
1. With gas OFF, connect manometer to manifold pressure tap
on outlet of gas control valve. See Figure 34. Use a manome-
ter with a 0" to 12" water column range.
Typical Gas Control Valve Honeywell
RegulatorAdjustment
UnderCa
Inlet
Pressure
Tap1/8NPT
HONEYWELL
©o
Outlet
Pressure
Tap
1/8NPT
/
OUTLET
25-24-98a
Manifold Gas Pressure Adjustment 2. Turn gas ON. Operate the furnace by using ajumper wire on
the R to W thermostat connection on the control.
NOTE: Make adjustment to manifold pressure with burners oper- 3. Remove manifold pressure adjustment screw cover on fur-
atin . nace as control valve. Turn ad_screw counterclock-
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