Control Settings Low Temperature; Merchandiser Electrical Data; Field Wiring - Hussmann INSIGHT REACH-IN Installation & Operation Manual

Standard Off Time defrost is time terminated. The defrost frequency
and lengths listed may require adjustment for specific store conditions.
Factors include:
• Store temperature and humidity
• Low head pressure
• Long refrigerant line runs
• Seasonal changes
• Merchandiser temperature lower than recommended
Stagger defrosts to maintain stable compressor loading and sufficient
defrost gas. When practical, defrost when store is closed.

CONTROL SETTINGS LOW TEMPERATURE

Parallel Compressor Rack:
Measure Discharge Air Temperature at the center of the case at the
discharge honeycomb. Merchandiser temperature must be controlled
by a mechanical or electronic pressure regulator or thermostat that will
be mounted on the rack.
Standard Electric defrost is temperature terminated. Failsafe must not
control defrost cycle length, especially when less than 208V power
supply is used for defrost heaters, or if frost build up is heavy from
shopping demands.
Optional Gas defrost is time terminated and has fan cycling thermostat.
The defrost frequency and lengths listed may require adjustment for
specific store conditions. Factors include:
• Store temperature and humidity
• Low head pressure
• Long refrigerant line runs
• Seasonal changes
• Merchandiser temperature lower than recommended
Stagger defrosts to maintain stable compressor loading and sufficient
defrost gas. When practical, defrost when store is closed.
HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3181178_A

MERCHANDISER ELECTRICAL DATA

Merchandiser data sheets for specific models are shipped with this
manual. The data sheets provide merchandiser electrical data, standard
electrical schematics, parts lists and performance data. Refer to the
merchandiser data sheets and merchandiser serial plate for electrical
information. Refer to the separate wiring diagrams shipped with the
case for specific information about the merchandiser and any optional
wiring kits that may have been applied.

FIELD WIRING

Field wiring must be sized for component amperes stamped on the
serial plate. Actual ampere draw may be less than specified. Field
wiring from the refrigeration control panel to the merchandisers
is required for defrost termination thermostats and for optional
refrigeration thermostats. When multiple merchandisers are on the
same defrost circuit, the defrost termination thermostats are wired in
series.
Always check the serial plate for component amperes.
Electric Defrost is standard for low temperature merchandisers and
requires temperature termination. Gas defrost is optional. Off Time
Defrost is standard for medium temperature merchandisers and is time
terminated.
When two or more merchandisers with full length wireways are
installed in line, remove the splashguards, end caps and wireway
covers, and install the nipple and nuts (supplied) providing electrical
passage from one merchandiser to the next. Following NEC and local
codes is the responsi bility of the electrical contractor.
2-8