Honeywell RM7800L1087 Installation Instructions Manual page 29

Item Description
V1 Upstream Valve Volume
V2 Downstream Valve Volume
D Pipe Size NPT (in.)
L Pipe Length (ft)
P
Valve Inlet Pressure (psig)
C
Burner Maximum Firing (cf/hr)
a
Divide inches w.c. by 27.7 to get psi.
b
Divide Btuh by 1000 to get cf/hr for natural gas or by 2550 to get cf/hr for LP gas.
Calculation of Valve Train Volume:
X = V1 + V2 + (A x L ÷ 144)
X = 0.0218 + 0.0267 + (3.356 x 1.75 ÷ 144) = 0.0893.
Calculation of Valve Proving Test Time:
Pipe Size
NPT (inches) V4295
3/8 0.0002
1/2 0.0002
3/4 0.0008
1 0.0009
1-1/4 0.0045
1-1/2 0.0045
2 0.0089
2-1/2 0.0441
3 0.0441
4 —
Pipe Size
NPT (inches) V4295
3/8 0.0011
1/2 0.0011
3/4 0.0026
1 0.0036
1-1/4 0.0148
1-1/2 0.0148
2 0.0267
2-1/2 0.0554
3 0.0554
4 —
Table 12. VPS Worksheet Example.
Information
V5055
V4295
2 in. NPT
1.75 ft
2
a
b 2.5 mbtu
Table 13. V1 Upstream Volumes for Honeywell Valves.
V4297A1013 V4297A1005
— —
— —
0.0093 0.0090
0.0093 0.0090
0.0093 0.0090
0.0093 —
0.0093 —
— —
— —
— —
Table 14. V2 Downstream Volumes for Honeywell Valves.
V4297A1013 V4297A1005
— —
— —
0.0282 0.0232
0.0282 0.0232
0.0282 0.0232
0.0282 —
0.0282 —
— —
— —
— —
29
RELAY MODULES WITH VALVE PROVING
Lookup Table
12
13
14
—
—
—
Test Time = 187,000 x (P x X ÷ C)
Test Time = 187,000 x (2 x 0.0893 ÷ 2500) = 13.4
seconds.
Round up to 14 seconds; enter 14 seconds into the VPS
Setup.
V48 V5055
— —
— —
0.0010 0.0046
0.0010 0.0046
0.0035 0.0046
0.0035 0.0218
0.0048 0.0218
0.0048 0.0227
0.0048 0.0227
— 0.0779
V48 V5055
— —
— —
0.0048 0.0067
0.0048 0.0067
0.0110 0.0067
0.0110 0.0238
0.0184 0.0238
0.0184 0.0245
0.0184 0.0245
— 0.0801
Results Formula Item
0.0218 V1
0.0267 V2
3.356 A
1.75 L
2 P
2500 C
V5097A1004 V5097A1012
— —
— —
0.0066 —
0.0066 —
0.0066 —
0.0066 —
0.0066 0.0285
— 0.0285
— 0.0285
— —
V5097A1004 V5097A1012
— —
— —
0.0093 —
0.0093 —
0.0093 —
0.0093 —
0.0093 0.0303
— 0.0303
— 0.0303
— —
32-00142—01