FORM 155.19-EG3 (1011)
11JOHNSON CONTROLS
Optional Features
SPECIAL TUBE MATERIALS AND WALL THICK‑
NESS
Millennium YPC Absorption units are designed for long life
with the stand ard tube materials and wall thicknesses in
each heat exchanger. For special applications where dif-
ferent tube specications are required, Johnson Controls
offers copper tubing with .028” (0.7 mm) (where .025” (0.6
mm) is standard) and .035” (0.9 mm) wall thicknesses.
Also, 90/10 cupro-nickel tubes are available for the ab-
sorber, evaporator, and condenser in both the standard
and the above-listed optional tube wall thickness.
WATER FLANGES
150 lb. ANSI raised-faced anges for the evaporator
and/or absorber/condenser water connection are fac tory
welded to water nozzles. Companion anges, bolts, must
and gaskets are not included.
WATER FLOW SWITCH
This is a paddle-type, vapor-proof water ow switch suit-
able for 150 PSIG (10.3 bar) DWP (300 PSIG (20.7bar)
available) for the absorber/condenser water circuit
(chilled-water ow switch is standard).
FACTORY PERFORMANCE TEST
After assembly, chillers can be individually performance
tested at the conditions specied by the customer. A
complete performance test report, signed by the resi dent
engineer, is furnished to the customer and includes the
following:
• Water ow rates and temperatures
• Steam consumption rate
• System operating temperatures and pressures
• Absorber solution concentrations
• All liquid levels in the sightglasses
• Exact solution and refrigerant charge amount
SPARE PUMPS
A complete set of replacement solution and refrigerant
pumps ships alongside the unit for local spare parts
inventory.
REMOTE RESET CONTROLS
Two optional boards allow for continuous reset of either
leaving chiller-water temperature or remote steam limit
using a 4 to 20mA, 10 to 10Vdc, or contact closure as op-
posed to the standard 1 to 11 second PWM signal. These
signals may be wired directly to the panel termi nal block
on the card le without any external interfac ing.
300 PSIG COMPACT WATERBOXES
300 PSIG compact waterboxes are available for ap-
plications that require above 150 PSIG design working
pressures for the evaporator, absorber, and condensers.
Additionally, 450 PSIG compact waterboxes are available
for some unit sizes.
MARINE WATER BOXES
Marine water boxes allow service access for cleaning of
the heat exchanger tubes without the need to break the
water piping. Bolted-on covers are arranged for conven-
ient access. ANSI/AWWA C-606 nozzle connections are
standard; anges are optional. Marine water boxes are
available for the evaporator or the absorber/condenser
circuits. Marine water boxes are only available for circuits
with 150 PSIG (10.34 bar) working pressures.
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