Carrier 58DH - Manual (Page 8)

START-UP AND ADJUSTMENT
In addition to the following information, refer to
Procedures for Induced-Draft Gas-Fired Furnaces
packaged with the unit.
NOTE: Furnace blower door must be in place to
complete 115-volt circuit to furnace.
(' M'l ION: Furnace is equipped w i t h a fusible
link in \csiibule area. Link w i l l melt if o\cr-
heating condition caused by inadequate com-
hiisliiMi
. 1 1 1 siippl\ iw impiopei \uiimi.'pi.Kluc'.
de\eiops. ¡h) nor jumper this fii.se. Correct
condition and replace lusc with identical part.
Gas service pressure must not exceed 14 in. wg
(8.1 oz) for natural gas, or 11 in. wg (6.3 oz) for LP
(propane).
NOTE: 035, 055, 070, 090 and 110 models are not
for use with LP gas.
NOTE: Gas valve regulator has been factory set at
3.5 in. wg for natural gas and 10.5 in. wg for LP
(propane). Refer to Procedures for Induced-Draft
Gas-Fired Furnaces for readjusting when checking
input.
Adjustment of Blower Speed
\\ \R\l\{i Dl^^ I'lin. i-i. I-I nil .i! p iW'T b.'iiHi
changing speed tap.
To change motor speed taps, remove motor tap
lead. See Table 6. Relocate it on desired terminal
on plug-in terminal block/speed selector located
on blower.
( \l I IO\ W l u i i .idiii'iiir.' blow. I N|i..ci!.
make certain that tempcratuie n.->t. across heat
exchanger docs not exceed that specified on
Table 6 — Speed Selector
Speed Tap IMo. Color
Common C White
Hi 1 Black
Med-Hi 2 Yellow
Med-Low 3 Blue
Low 4 Red
Automatic Gas Control Valve — Unit is equipped
with an automatic gas control valve. If not already
checked when lighting main burner, check proper
operation of valve by moving room thermostat
pointer above room temperature, and observing
that main burners light on call for heat (there will
be a time delay), and go off when pointer is moved
below room temperature setting.
NOTE: For ease of adjusting pilot flame, disconnect
and tape one power lead at main gas valve. For
Model 646 gas valve, disconnect terminal no. 1.
This prevents main burner ignition and allows time
to adjust pilot. Reconnect power lead after
adjustment.
PILOT TUBE CONNECTION
PILOT ADJUSTMENT
^ PIPE PLUG
REGULATOR
ADJUSTMENT
Fig. 16 — Redundant Automatic Gas
Control Valve
CARE AND MAINTENANCE
C'-\l riON: To prcNcnl possible damage to
equipment or personal injur\. maintenance
should be performed onl\ b\ quaiiiied persons.
W \ K \ l \ ( i : Ne'.ei 'inic.iiiMhiii:; hc.ii I in iiac.-.
1. .Aerosol cans. rags, brooms, dust mops,
cleaning aids and tools.
2. Soap powders, bleaches, wa.xcs or other
cleaning compounds; plastics, gasoline, kero­
sene. lighter fluids. dr\ cleaning fluids or
other combustible fluids.
3. Paint thinners. painting eompoumis. paper
For continuing high performance, and to mini­
mize possible equipment failure, it is essential that
periodic maintenance be performed on this equip­
ment. Consult dealer as to proper frequency of
maintenance and availability of a maintenance
contract.
Ability to properly perform maintenance on this
equipment requires certain mechanical skills and
tools. If you do not possess them, contact dealer
for maintenance.
\\ \ R \ I N t i I III n o i l g.is.iiul clccii ic.i! siipnlics
to unit before performing any maintenance oi
ser\iec on unit, f ollow relighting instructions
on plate attached to Itirnaee.
Minimum Maintenance Requirements
1. Check and clean or replace air filter each month
or as required.
2. Check blower motor and wheel for cleanliness
and lubrication each heating and cooling season.
Clean and lubricate as necessary.