Справочник Пользователя для Slant/Fin VSPH-60

22

a.

Input for PROPANE is approximately at rating shown on 

ating plate when manifold pressure is 9-

1

⁄

2

" water column

b. Input for NATURAL GAS is approximately at rating 

when manifold pressure is 3-1/2" water column, but 

should be checked on the gas meter:

Btuh Input = Btu/cu. ft. metered in 3 minutes x 20

For 1000 Btu/cu. ft. gas, this becomes:

For 1050 Btu/cu. ft. gas, this becomes:

4. The higher heating value of gas varies substantially for 

different localities. Consult with Slant/Fin’s Technical Ser-

vice Department for reorificing procedures if any of the 

following apply:

a. Boiler (burner) is over firing. CAUTION! National Fuel 

Gas Code (ANSI Z223. -latest edition) does NOT per-

mit firing at a higher input rate than the input rate indi-

cated on the boiler rating plate in order to avoid haz-

ardous conditions such as explosion or carbon monox-

ide poisoning.

b. Poor higher heating value of gas is causing the actual 

input to be substantially lower than the rating plate 

indication.

The gas metered in 3 minutes to obtain rated input for 

each boiler model, using 1000 Btu/cu. ft. gas, is tabu-

lated in gas rate table.

INTEGRATED BOILER CONTROL
The integrated boiler control monitors the status of the room

thermostat, high limit control  (Aquastat), pressure switch and

the flame sensor. It controls the operation of circulator, induc-

er motor, gas valve and spark for pilot ignition. The boiler con-

trol also determines the sequence of operation and timing for

pre and post purge periods, trail for ignition and lockout.

The control indicator lights (LED’s) provide information of boil-

er operation when lights are steady on or diagnostic informa-

tion when they are flashing in order to help to determine the

cause of boiler failure.

Boiler rated input in

cu. ft./hr. of 1000 Btu/cu. ft.

Natural Gas

60
90

120
150
180

Cubic Feet Gas Consumption

1000 Btu/cu. ft. gas, in

3 minutes, at rated input

3.00
4.50
6.00
7.50
9.00

O = LED off

= LED steady on

Standby-Boiler waits for call for
heat

Thermostat calls for heat 
Circulator on

Boiler water temperature below
high limit setting
Inducer on

Pressure switch contacts closed
30 seconds pre-purge period
Trial for ignition

Gas valve open
Pilot flame and main burners on
Boiler heating period

Thermostat call for heat ends
Circulator off
15 seconds post purge period.
Burners off.

O

O

O

O

O

O

O

O

O

O

O

O