Grain Systems PNEG-1797 - Manual (Page 29)

4. Dryer Installation
PNEG-1797CE CE Approved T-Series Tower Dryer 29
Fuel Connections
LPG Dryers with Internal Vaporizers
The dryer is designed to operate on liquid LPG with gross calorific value of 93.8 MJ/m
3
. The fuel supplier
should provide liquid fuel from the tank to intake point at the strainer on the dryer pipe train.
Natural Gas (NG) Dryers
The dryer is designed to operate on natural gas with gross calorific value of 39.0 MJ/m
3
. The dryer is
equipped with a natural gas supply pipe system connected to the heater solenoid valves. A regulated
pressure of 700 mBar must be provided at the connection to the dryer, with gas available in sufficient
volume to maintain operating pressure.
Commissioning Checks
Before starting the dryer check:
1. Pressure tightness.
2. Over pressure valve operation.
3. Pressure relief operation.
4. Maximum pressure switch operation.
Electrical Connection
1. Power supply must be adequate for the full current draw, plus starting loads for the electrical
equipment on the dryer.
2. Power is connected into the main disconnect in the dryer power panel.
3. The dryer must be properly earthed (grounded), which may require the installation of a suitable
ground rod. This must be designed and carried out by a suitably qualified electrician in accordance
with local regulations and codes and taking into account site ground conditions.
4. Earth connection should be made into the PE terminal in the power panel and to a suitable location
on the dryer structure.
5. The electrical installer should carry out full electrical safety checks including earth continuity during
commissioning of the dryer.
Connecting Auxiliary Conveyors
Auxiliary load and unload equipment can be wired directly to the dryer.
1. Maximum power not to exceed 7.5 kW.
2. Larger than 7.5 kW must be powered from an alternative source and contactor, though control may
be run through the dryer control panel.