Domnick Hunter PNEUDRI DX102 Manuel D'installation, De Mise En Service Et D'entretien page 27

By-pass line and valve
It should be noted that the use of a by-pass line allows wet and untreated air into the system. For continuous
duty, a standby dryer should be installed. Even with multi-bank systems, this means that only one more bank is
required, which offers the benefit of 100% standby.
Shut-off valves
Shut-off valves (7) must be fitted to the inlet and outlet pipework of each dryer bank and are used during the
'start up/shutdown' procedures and during maintenance periods.
Manifold & Drains
On installations with fabricated manifolds, an automatic drain valve must be fitted at the lowest point of the inlet
manifold to prevent condensate from entering the dryer.
Recommended inlet and outlet fabricated manifolds to suit each dryer are listed below.
DX 102/103/104/105
DH 102/104
DX 106/107/108/110
DH 106/108/110
DX 206/207/208/210/306/307/308/310
DH 206/208/210/306/308/310
DX 408/410
DH 408/410
Flexible Connections
A flexible connection must be used on the outlet of the Desiccant Air Dryer and fitted before the AR filter.
E) Electrical
General
Ensure that the dryer is connected to a suitably rated AC supply with means of external fused isolation.
Installation should only be carried out by a qualified electrical engineer.
The dryer must only be used on alternating current (AC) at the voltage shown on the rating plate [fixed to the
instrumentation shroud] and MUST BE EARTHED.
MODEL
INLET & OUTLET DISTRIBUTION MANIFOLDS
For larger installations please contact domnick hunter.
PIPE DIAMETER
25
2"
2 1 ⁄ "
2
6"
8"