Carrier WEATHERMAKER 8000 58WAV Operations Instructions download pdf (Page 8)

Never purge a line into a combustion chamber. Never use

matches, candles, flame, or other sources of ignition for the

purpose of checking leakage. Use a soap-and-water solution

to check for leakage. Failure to follow this warning can cause

a fire, explosion, personal injury, or death.

Table 4—Maximum Capacity of Pipe*

NOMINAL IRON

PIPE SIZE

(IN.)

INTERNAL

DIAMETER

(IN.)

LENGTH OF PIPE (FT)

10 20 30 40 50

1/2 0.622 175 120 97 82 73

3/4 0.824 360 250 200 170 151

1 1.049 680 465 375 320 285

1-1/4 1.380 1400 950 770 660 580

1-1/2 1.610 2100 1460 1180 990 900

* Cubic ft of gas per hr for gas pressures of 0.5 psig (14-in. wc) or less, and a

pressure drop of 0.5-in. wc (based on a 0.60 specific gravity gas). Ref: Table

10-2 NFPA 54-1999.

Install a sediment trap in the riser leading to the furnace. The trap

can be installed by connecting a tee to the riser leading from the

furnace. Connect a capped nipple into the lower end of the tee. The

capped nipple should extend below the level of the gas controls.

(See Fig. 8.)

Apply joint compound (pipe dope) sparingly and only to the male

threads of each joint. The compound must be resistant to the action

of propane gas.

An accessible manual shutoff valve MUST be installed upstream

of the furnace gas controls and within 72 in. of the furnace. A

1/8-in. NPT plugged tapping, accessible for test gage connection,

MUST be installed immediately upstream of the gas supply

connection to the furnace and downstream of the manual shutoff

valve. Place ground joint union between the gas control manifold

and the manual shutoff valve.

Piping should be pressure tested in accordance with local and

national plumbing and gas codes before the furnace has been

attached. If the pressure exceeds 0.5 psig (14-in. wc), the gas

supply pipe must be disconnected from the furnace and capped

before the pressure test. If the test pressure is equal to or less than

0.5 psig (14-in. wc), turn off electric shutoff switch located on the

gas valve before the test. It is recommended that the ground joint

union be loosened before pressure testing. After all connections

have been made, purge the lines and check for leakage with

regulated gas supply pressure.

Step 8—Electrical Connections

115-V WIRING — Refer to the unit rating plate or Table 5 for

equipment electrical requirements. The control system requires an

earth ground for proper operation.

Do not connect aluminum wire between disconnect switch

and furnace. Use only copper wire.

Make all electrical connections in accordance with the National

Electrical Code (NEC) ANSI/NFPA 70-1999 and local codes or

ordinances that might apply. For Canadian installations, all elec-

trical connections must be made in accordance with CSA C22.1

Canadian Electrical Code, or authorities having jurisdiction.

The cabinet MUST have an uninterrupted or unbroken ground

according to NEC, ANSI/NFPA 70-1999 and Canadian

Electrical Code, CSA C22.1 or local codes to minimize

personal injury if an electrical fault should occur. This may

consist of electrical wire or conduit approved for electrical

ground when installed in accordance with existing electrical

codes. Do not use gas piping as an electrical ground. Failure

to follow this warning could result in electrical shock, fire, or

death.

The junction box (J-box) can be moved to the left-hand side of the

furnace when a left-side power supply is desired. Remove the 2

screws holding the auxiliary J-box. Mount the J-box on the

left-hand side of the furnace (holes have been pre-drilled in

casing). When moved, tuck the wiring harness behind the clip

provided to keep extra wire lengths out of the way.

NOTE: Proper polarity must be maintained for 115-v wiring. If

polarity is incorrect, control status indicator light will flash rapidly

and the furnace will not operate.

24-V WIRING

Make field 24-v connections at the 24-v terminal strip. (See Fig.

15.) Connect terminal Y/Y2 as shown in Fig. 9 for proper cooling

operation. Use only AWG No. 18, color-coded, copper thermostat

wire.

The 24-v circuit contains an automotive-type, 3-amp fuse located

on the main control board. Any 24-v shorts during installation,

service, or maintenance could cause this fuse to blow. If fuse

replacement is required, use ONLY a 3-amp fuse of identical size.

ACCESSORIES

1. Electronic Air Cleaner (EAC)

Two quick-connect terminals, marked EAC-1 and EAC-2, are

provided for EAC connection. (See Fig. 15). These terminals

are energized with 115-v, (1.0-amp maximum) during blower

motor operation.

Fig. 8—Typical Gas Pipe Arrangement

A89417

GAS

SUPPLY

MANUAL

SHUTOFF

VALVE

(REQUIRED)

SEDIMENT

TRAP

UNION

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 23 24

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Carrier WEATHERMAKER 8000 58WAV Operations Instructions Page 8

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