Installation Fittings - Viessmann Vitocrossal 300 CU3A 26 Installation Instructions Manual

Boiler Connections
Vitocrossal 300 CU3A 26 to 199 Installation
Connections
(continued)

Installation fittings

Safety header
A Pressure relief valve ¾ in., 30 psig
B Nipple ¾ in. x 1b in.
C Street elbow ¾ in.
D Air vent
E Bushing ¾ in. to e in.
F Tee, ¾ in.
G Nipple ¾ in. x 3b in.
H Reducing coupling 1a in. x ¾ in.
Supply fitting*1
I Reducing tee 1a in. x 1a in. x b in.
J Thermowell
K Temperature and pressure gauge
Gas fitting
L Gas ball valve ¾ in.
Drain fitting
M Reducing tee 1 in. x 1 in. x ¾ in.
N Sediment faucet ¾ in.
Venting
O CPVC vent adaptor 80 mm to 3 in.
(used with CPVC/ABS air intake pipe connections)
*1 Install anywhere in supply piping near boiler
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