Crown Boiler CLBF68-112 Upgrade Manual - Página 2

Procurar online ou descarregar pdf Upgrade Manual para Forno Crown Boiler CLBF68-112. Crown Boiler CLBF68-112 6 páginas. Oil furnace circulating fan upgrade kits

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Only qualified service personnel shall perform installation and service.

Introduction:

These instructions list the steps required to field install a larger centrifugal blower

and ¾ HP motor assembly in any of the Crown oil-fired furnace models previously

noted. A blower upgrade kit will produce an increase in high-speed airflow to enable

the furnace to support an evaporator coil capable of producing approximately four

(4) tons of direct expansion cooling.

NOTICE

The blower upgrade kit is equipped with a ¾ HP, PSC-type, fan

motor. Electrical service to the furnace may have to be upgraded, in certain

situations, to support the larger motor.

Table 1: Electrical Power Supply Requirements for a Furnace Equipped w/

Total Current (A)

Minimum Circuit Ampacity (A)

Maximum Fuse Size (A)

Installation:

A. Remove the Standard Blower / Motor Assembly

! WARNING:

furnace to cool to room temperature before proceeding with disassembly.

! WARNING:

blower terminal block, use a voltmeter (or equivalent device) to measure

the electrical potential across the red and white wires and the orange and

white wires at the terminal block. No (zero) voltage readings confirm power

to the blower is off.

! CAUTION:

thermostat may interfere with easily removing the blower from the furnace.

To avoid damaging the thermostat, temporarily remove the thermostat

BEFORE removing the blower. Loosen two (2) sheet metal screws fixing

the thermostat to the blower support panel and carefully move the

thermostat to the side. Retain these fasteners for later reuse. It should not

be necessary to disconnect the electrical wiring from the thermostat.

1. Set the room thermostat operating mode to "OFF" and shutoff electrical

power to furnace at the disconnecting switch.

2. Remove the blower access panel.

Standard or Upgrade Motors

Standard ½ HP Motor

If the heating system was recently operating, allow the

BEFORE disconnecting the furnace wiring harness at the

On horizontal / counterflow models, the auxiliary high limit

10.2

12.1

Upgrade ¾ HP Motor

13.6

16.4