Honeywell SV2 Series User Manual page 77

Mixing Units
Dedicated SV2 Series premix valve mixing units have been designed to work with and mate to the FARMOD and pulse lines as
well as to provide the optimum fuel-air mixing to ensure smooth appliance operation, efficiency and reliability. Refer to
and Fig. 37-Fig. 39 for overall dimensional information, bolt patterns and orifice sizes. For mechanical installation details, refer
to the mixing unit installation instructions (32-00044), which is shipped with each mixing unit.
Mixing Unit Part Number
V2MU0300-000
V2MU0500-000
V2MU0800-000
V2MU1000-000
V2MU2000-000
Table 18. V2MU mixing unit models.
1. The reference load is defined as the achieved capacity at an air pressure drop of 15 mbar / 5.9 in w.c. and lambda of 1.250.
Values for natural gas / G20.
IMPORTANT
For optimal fuel/air ratio performance, it is recommended to assemble an extension pipe between the V2V gas valve and V2MU
Mixing Unit as indicated in
specified in Table 19 can be used.
NOTES:
• If a manual safety shut-off valve is assembled between the gas valve and the Mixing Unit, the MSOV length can be subtracted
from the minimum recommended lengths in
• If the V2MU2000 is assembled directly to the valve, remove the valve's factory supplied outlet O-ring and mount the
V2MU2000 using its factory supplied O-ring in the flange of the V2MU2000 for sealing purposes.
• Shorter pipe lengths may be possible but must be tested to ensure acceptable performance.
Mixing Unit Part Number
V2MU0300
V2MU0500, V2MU0800, V2MU1000
V2MU2000
Table 19. Minimum piping length between V2MU mixing units and SV2 Series valve.
The Honeywell recommended tubing configurations between the valves and the V2MU mixing units are shown in
Fig. 34: 1in/DN25 valve to V2MU0300/0500
SV2 Series Safety Shut-off Valves
V2F, V2V
Reference Net Load
300kW / 1.0 MMBTU
500kW / 1.7 MMBTU
800kW / 2.7 MMBTU
1000kW / 3.4 MMBTU
2000kW / 6.8 MMBTU
Table 19 and Fig. 34, Fig. 35 and Fig.
Table 19.
Gas Extension Pipe Minimum Length
(mm / in)
222 / 8.7
330 / 13.0
425 / 16.7
Minimum Net Load
1
30kW / 0.10 MMBTU
50kW / 0.17 MMBTU
80kW / 0.27 MMBTU
100kW / 0.34 MMBTU
200kW / 0.68 MMBTU
36. Alternatively, a 90-degree elbow with an inner diameter as
77
SV2 SERIES SAFETY SHUT-OFF VALVES USER MANUAL
Gas Elbow Inner Diameter (mm / in)
44.3 / 1.74
66.0 / 2.60
84.9 / 3.34
Table 18
Fig. 34-36.