Friedrich Hazardgard SH20M50B Installation & Operation Manual page 23

Chassis Wiring and Preparation (ATEX & IECEx Models)
STEP1 Remove the junction box from the shipping position underneath the fan motor (Figure 7). Install junction box mounting legs
to back of the junction box using 4 provided machine screws (Figure 32-1). Mount junction box to provided holes on side of air
conditioner sleeve using 4 provided sheet metal screws and 4 serrated washers. Ensure serrated washers are between legs of
junction box and painted metal sleeve (figure 32-2).
Figure 32
STEP 2 Proceed to make the STEP 1 of the Chassis Installation (see page 25 ) then come back to STEP 3
STEP 3 Insert air conditioner's electric cable through provided cable gland on bottom of electrical junction box and tighten cable gland
nut (see Item 3) torque to 15 N-m, 106 in-lbs. Strip the three electrical conductors approximately 6.35 mm (1/4 inch) install
under provided terminal block LINE terminals and tighten (Item 4). Fixed field wiring must include a field provided disconnect
(all poles). Provide fixed field wiring conductors and cable gland with a minimum IP44 rating. Connect wiring conductors under
provided terminal block LOAD terminals and tighten (Item 5). Field conductors to be copper and a minimum 1.29 to 2.06 mm
(16 to 12 AWG). Ensure both LINE, LOAD and GROUNDs are adequately secured to provided termination points.
Figure 33
EMI Filter
NOTE:
Terminal block screw tightening torque .56N-m (5 in lbs) max. Wire size should be 1.29 to 2.06 mm (12 to
Terminal block screw tightening torque .56N-m (5 in lbf) max. Wire size should be 1.29 to 2.06 mm (12 to
NOTE:
16AWG)
16AWG)
NOTE:
Notice: this air conditioner must be installed in accordance with national wiring regulations of country where Notice: this air conditioner must be installed in accordance with national wiring regulations of country
NOTE:
installed. Electrical connections to equipment must be carried out by qualified personnel per EN/IEC 6079-14. where installed. Electrical connections to equipment must be carried out by qualified personnel per
Fixed wiring must include a field provided disconnect (all poles.) Repairs affecting hazard location protection EN/IEC 6079-14. Fixed wiring must include a field provided disconnect (all poles.) Repairs affecting
hazard location protection must be carried out by a qualified electrician in accordance with EN/IEC
must be carried out by a qualified electrician in accordance with NEC/CEC 501.10 (B) and EN/IEC 60079-19.
60079-19.
NOTE:
To maintain IP44 protection and electrical safety, the Hazardgard unit must be installed in accordance to the
NOTE: To maintain IP44 protection and electrical safety, the Hazardgard unit must be installed in accordance
installation instructions provided with this product.
to the installation instructions provided with this product.
-FIELD CONNECTION-
-AIR CONDITIONER-
23