Viessmann VITOCROSSAL 200 CI2 Series Installation Instructions Manual page 15

Vitocrossal 200 CI2 Installation
Boiler Connections
Safety Header (continued)
Legend
1 Boiler return: 2 in. NPT for CI2 399/500
2 b in. ANSI flange for CI2 750/1000 *1
4 in. ANSI flange for CI2 1500/2000 *1
2 Boiler supply: 2 in. NPT for CI2 399/500
2 b in. ANSI flange for CI2 750/1000 *1
4 in. ANSI flange for CI2 1500/2000 *1
3 Safety header: (Pressure relief valve, low water cutoff,
automatic air vent and temperature/pressure gauge)
A Hex bushing b in. x e in.
B Air vent with shut-off base
C Street elbow c in.
D Reducing elbow 1a in. to 1 in.
E Nipple 1 in.
F Pressure relief valve, 80 psi *2
G Low water cutoff
H Temperature/pressure gauge
I Reducer 1b in. to 1 in.
(continued)
4 Drains:
K Reducer 1b in. x c in.
J Sediment faucet c in.
5 Gas line fittings:
L Gas gas shut-off valve,
1b in. for models 399, 500, 750 and 1000,
2 in. for models 1500 and 2000
*1 Counter flanges, gaskets and hardware (field supplied)
*2 Alternate pressure relief valves are available depending
on operating pressure requirements. Contact your local
Viessmann sales representative for details.
Installation
15