Lincoln Electric IM928 RED-D-ARC ZR-8 - Manual (Page 15)

A-8 INSTALLATION
ZR-8
A-8
STANDBY POWER CONNECTIONS
The ZR-8 is suitable for temporary, standby, or emer-
gency power using the engine manufacturer
’ s recom-
mended maintenance schedule.
The ZR-8 can be permanently installed as a standby
power unit for 240V-3 wire, single phase 38 ampere
service.
(Connections must be made by a licensed electri-
cian who can determine how the 120/240V power
can be adapted to the particular installation and
comply with all applicable electrical codes.) The
following information can be used as a guide by
the electrician for most applications (refer also to
the connection diagram shown in Figure 1.)
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1. Install a double pole, double throw switch between
the power company meter and the premises dis-
connect.
Switch rating must be the same or greater than the
customer
’ s premises disconnect and service over-
current protection.
2. Take necessary steps to assure load is limited to
the capacity of the ZR-8 by installing a 38 amp
240V double pole circuit breaker. Maximum rated
load for the 240V auxiliary is 38 amperes. Loading
above 38 amperes will reduce output voltage
below the allowable -10% of rated voltage which
may damage appliances or other motor-driven
equipment.
3. Install a 50 amp 120/240V plug (NEMA type 14-50)
to the Double Pole Circuit Breaker using No. 8, 4
conductor cable of the desired length. (The 50 amp
120/240V plug is available in the optional plug kit.)
4. Plug this cable into the 50 amp 120/240V recepta-
cle on the ZR-8 case front.
WARNING
AUXILIARY POWER WHILE WELDING
Simultaneous welding and power loads are permitted
by following Table I. The permissible currents shown
assume that current is being drawn from either the
120V or 240V supply (not both at the same time).
Also, the
“ Output Control ” is set at “ 10 ” for maximum
auxiliary power.
TABLE I
SIMULTANEOUS WELDING AND POWER
Output Selector Permissible Power Permissible Auxiliary
Setting Watts (Unity Power Current in Amperes
Factor) @ 120V * -or- @ 240V
Max. Stick or Wire
Feed Setting None 0 0
145 Stick Setting 3450 32 16
90 Stick Setting 6000 50 ** 25
NO WELDING 9000 76 ** 38
*
Each duplex receptacle is limited to 20 amps.
**
Not to exceed 40A per 120VAC branch circuit when
splitting the 240 VAC output.