3
In the case of Hydrobox
Drain piping
B
A
B
A
B
A
6
NOTE
● Please use PVC pipe for drain piping.
● Use only compatible adhesive/glue for pipe joint.
● For proper drain-off, install pipework with gradient/fall of min. 1/100.
● Install pipe to fall continuously without bowing.
● Do not install any air purge points on condensate drain pipe run.
● Condensate drain pipe must discharge to suitable and safe outlet location. It should not be directly connected to any
sewer-connected pipework that may introduce sulphurous gases/smells to the building.
* “VP-20” is a PVC pipe with an outside diameter of 26 mm and an inside diameter of 20 mm.
Field supplied drain pipe
(VP-20A)* (Insulated)
Connect drain socket to field pipeworks
using suitable adhesive bond.
Connect the drain pipe only for Heating/Cooling models.
<Cylinder unit>
<Hydrobox>
Field supplied drain pipe
(VP-20A)* (Insulated)
Connect drain socket to field
pipeworks using suitable
adhesive bond.
Pipe cover
(Local supply)
Tightening torque: 42N·m
Use double spanners.
Do not use the fl exible hose below the bend radius of 150 mm.
After hand tighten the nut,
tighten the joint 1 turn.
If necessary, tighten by
another 1/4 of a turn.
Heating only model
Letter Pipe description
A
Space heating/Indirect DHW tank
(primary) return connection
B
Space heating/Indirect DHW tank
(primary) fl ow connection
Heating only model
Heating and cooling model
<View from below>
RG79F146H03_en.indd 6
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