Carrier 58CTA/CTX User Manual download pdf (Page 37)

b. Run for 3 minutes in low--heat operation.

c. Measure time (in sec) for gas meter to complete 1 revolu-

tion and note reading. The 2 or 5 cubic feet dial provides

a more accurate measurement of gas flow.

BURNER

ORIFICE

A93059

Fig. 54 -- Orifice Hole

d. Refer to Table 12 for cubic ft. of gas per hr.

e. Multiply gas rate cu ft. /hr by heating value (Btuh/cu ft.

) to obtain input. If clocked rate does not match required

input from Step 1, increase manifold pressure to increase

input or decrease manifold pressure to decrease input.

Repeat steps b through e until correct low heat input is

achieved. Re--install low--heat regulator seal cap on gas

valve.

5. Set low--heat temperature rise. The furnace must operate

within the temperature rise ranges specified on the furnace

rating plate. Do not exceed temperature rise ranges spe-

cified on unit rating plate for high--and low--heat.

Determine the temperature rise as follows:

NOTE: Blower access door must be installed when taking

temperature rise reading. Leaving blower access door off will

result in incorrect temperature measurements.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury or death.

Disconnect 115--v electrical power before changing speed

tap.

WARNING

a. Verify unit is running in low heat per Step 3. Place ther-

mometers in return and supply ducts as close to furnace

as possible. Be sure thermometers do not see radiant heat

from heat exchangers. Radiant heat affects temperature

rise readings. This practice is particularly important with

straight--run ducts.

b. When thermometer readings stabilize, subtract return--air

temperaturefrom supply--air temperature to determineair

temperature rise.

NOTE: If the temperature rise is outside this range, first check:

(1.) Gas input for low heat operation.

(2.) Derate for altitude if applicable.

(3.) Return and supply ducts for excessive restrictions

causing static pressures greater than 0.50--in. wc.

58CT

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 55 56

Comments to this Manuals

No comments

Carrier 58CTA/CTX User Manual Page 37

Comments to this Manuals

Related products and manuals for Cookers Carrier 58CTA/CTX