Safety Header - Viessmann Vitocrossal 200 Installation Instructions Manual

Vitocrossal 200 CM2 186 to 311 Installation
Boiler Connections
Legend
1 Boiler return: (ANSI Weld neck flanges 2b in.)
2 Boiler supply: (ANSI Weld neck flanges 2b in.)
3 Safety port (Safety valve, low water cutoff and
automatic air vent) NPT 1a
A Cross 1a in.
B Hex bushing 1a in. x e in.
C Air vent with shut-off base
D Hex bushing 1a in. x c in.
E 90° Street elbow c in.
F Nipple c in. x 1 b in.
G Pressure relief valve, 75 psi
H Low water cutoff
4 Air vent or pressure gauge fem. connection NPT b in.
I Hex bushing b in. x a in.
J Pressure gauge
5 Drain and fitting for membrane expansion tank NPT 1
6 Condensing water drain NPT b in.
K Tee 1b x 1b x c
L Sediment faucet c in.
(continued)

Safety Header

CAUTION
Do not connect heating system to safety header.
1. Locate safety port on boiler.
2. Install safety header to safety port.
Water pressure: 75 psi (5.2 bar)
Testing pressure: 112 psi (8.2 bar)
Min. water pressure: 8 psi (0.5 bar)
Note: The minimum water pressure is necessary for safe
operation.
Safety valve: All boilers must have a pressure relief valve.
Note: Make all connections free of load and torque stresses.
Boiler
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