Slant/Fin VSPH-180 - Manual (Page 22)

V ICTORY VSPH Models
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
EXAMPLE #1:
For 1000 Btu/cu. ft. gas, this becomes:
Btuh Input = cu. ft. metered in 3 minutes x 1000 Btu/cu. ft. x 20
EXAMPLE #2:
For 1050 Btu/cu. ft. gas, this becomes:
Btuh Input = cu. ft. metered in 3 minutes x 1050 Btu/cu. ft. x 20
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
Gas Rate Table
O = LED off = LED steady on
A. NORMAL OPERATION - STATUS OF INDICATOR LIGHTS (LED’S)
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.
DESCRIPTION OF OPERATION
POWER
LED
TSTAT/CIRC
LED
LIMIT
LED
PRESS
SWITCH
LED
FLAME
LED
O
O
O
O
O
O
O
O
O
O
O
O