High Efficiency, Superior Indoor Air Quality
Single Circuit Water Source Heat Pumps
Installation, Operation and Maintenance Manual
Sizes: 024 to 072 — Vertical
Model: B-Vintage
MAMM-WSHP-IOM-1BA (February 2012)
P/N 71144915
Table of Contents
Model Nomenclature ·················································································································· 3
Transportation and Storage ········································································································ 3
Installation ·································································································································· 4
Discharge Conversion—Horizontal Units ··················································································· 4
Unit Location and Clearances ···································································································· 5
Unit Mounting ····························································································································· 6
Ductwork and Attenuation ·········································································································· 7
Ventilation Air ····························································································································· 7
Piping ········································································································································· 8
Cleaning and Flushing ················································································································ 9
Start-up····································································································································· 10
Operating Limits ······················································································································· 11
Controls ···································································································································· 12
I/O 583 ····································································································································· 12
I/O 6126···································································································································· 14
General Maintenance ··············································································································· 17
Parts and Service support ········································································································ 17
Troubleshooting ························································································································ 18
Performance Troubleshooting ································································································· 19
Unit check-out sheet ················································································································ 20
MAMM-WSHP-IOM-1BA (February 2012)
B-Vintage Vertical
Size 024 to 072
2
Model Nomenclature
F -024- V- H- B
Voltage
BTU/hr Cooling
Unit Type Temperature Range Vintage
D = 208-230/1/60
F = 208-230/3/60
G = 460/3/60
J = 380/3/50
K = 575/3/60
L = 220-240/1/50
Illustrations cover the general appearance of Mammoth products at the time of publication and Mammoth, Inc. reserves the right to make changes
in design and construction at anytime without notice.
024 = 24,000 V = Vertical H = Standard Range
030 = 30,000 L = Low Temp Operation
036 = 36,000
042 = 42,000
048 = 48,000
060 = 60,000
072 = 72,000
“Mammoth” is a registered trademark of Mammoth, Inc.
©Mammoth, Inc. 2012. All rights reserved throughout the world.
Transportation and Storage
Upon receipt of the equipment, check for visible damage. Make a notation on the shipper’s delivery ticket
before signing. If there is any evidence of rough handling, immediately check for concealed damage. If any
damage is found, notify the carrier within 48 hours to
establish your claim and request their inspection and a
report. Then contact the Mammoth Service department
at (952) 358-6618 or info@mammoth-inc.com
for a warranty claim number.
MAMM-WSHP-IOM-1BA (February 2012)
Do not stand or transport the unit on end. In the
event that elevator transfer makes up-ended positioning unavoidable, absolutely ensure that the unit is in
the normal upright position for at least 24 hours before
operating.
Temporary storage at the job site must be indoors,
completely sheltered from rain, snow, etc. High or low
temperatures naturally associated with weather patterns will not harm units. Excessively high temperatures, 140°F (60°C) and higher, may deteriorate certain
plastic materials and cause permanent damage.
3
Installation
General
IMPORTANT:
Mammoth water source heat pumps should be installed only by qualified personnel, experienced in the
installation of this equipment and related systems.
Read these instructions carefully before unpacking,
installing and operating this unit
1. To prevent damage, this equipment should not be
operated for supplementary heating and cooling
during the construction period.
2. Inspect the unit for any specific tagging numbers
indicated by the factory per a request from the installing contractor.
3. Check the unit nameplate for the size and voltage
rating and confirm against the plans that the unit is
being installed in the correct location.
4. Verify the installation location with the piping, sheet
metal and electrical contractors prior to installation
5. Verify all clearances are available for the unit prior
to installation.
6. Note the location and routing of water piping, condensate drain piping, and electrical wiring. The locations of these items are clearly marked on submittal drawings.
7. Mammoth recommends the unit be covered during
construction to protect components from dust and
other harmful material. This is critical while spraying fireproofing material on bar joists, sandblasting,
spray painting and plastering.
NOTE:
Check the unit name plate for correct voltage with the
plans before installing the equipment. Make sure all
electrical ground connections are made in accordance
with local code.
MAMM-WSHP-IOM-1BA (February 2012)
4
Unit Location and Clearances
Units can be mounted on the floor or a concrete pad,
typically in a mechanical closet or other area enclosed
from the space to promote a quieter occupied environment.
The diagrams below show minimum suggested clearances. Any additional clearances would be beneficial,
but not always necessary. The requirements on any
specific unit may increase or be reduced depending on
Unit clearances
several factors such as maintenance requirements and
mechanical or electrical installation codes. If return air
is not ducted, enough clearance will be required to provide for adequate airflow.
Units need to be accessed on three sides; two panels
for the compressor and blower, one for the electrical
panel and compressor compartment. Unit filters are
removed from the right or left side.
MAMM-WSHP-IOM-1BA (February 2012)
5
Ductwork and Attenuation
Discharge ductwork is normally used with B-vintage
single circuit units. Return air ductwork may also be
required.
Discharge ductwork should include a non-insulated
transition from the unit connection to a flexible
connector at the full duct size, a short run of duct and
an elbow internally lined with insulation but without
turning vanes. The main duct tees into branch circuits
with discharge diffusers.
Ventilation Air
Outside air may be required for ventilation. The
temperature of the ventilation air must be controlled so
that the mixture of outside air and return air entering
the unit is within application limits. It is typical to close
off the ventilation air system during unoccupied periods
(i.e. night setback).
Return air is typically brought in through a grille in a
mechanical closet door. The unit should be located
ninety degrees from the door return to eliminate any
“line of sight”. Return air can be brought in through the
grille and ducted to the unit.
Return ducting is facilitated through use of a filter rack
that is designed to accept return air ducting. Return
ducting will likely increase the required width of the
closet.
The ventilation air system is typically a separate
building subsystem with distribution ductwork. Simple
introduction of the outside air into each return air
plenum chamber reasonably close to the unit air inlet is
recommended. Do not duct outside air directly to the
unit inlet. Provide sufficient distance for the thorough
mixing of outside and return air.
MAMM-WSHP-IOM-1BA (February 2012)
6
Supply Piping
IMPORTANT:
Prior to first operation of B-Vintage units, the water
circulation system must be cleaned and flushed of all
construction dirt and debris. After the cleaning
and flushing has taken place, the initial connection
should have all valves wide open in preparation for
start-up.
1. All units should be connected to supply and return
2. The piping may be steel, copper, or PVC. Avoid
piping in a two-pipe reverse return configuration. A
reverse return system is inherently self-balancing
and requires only trim balancing where multiple
quantities of heat pumps with different flow and
pressure drop characteristics exist in the same
loop. Check for proper water balance by measuring
differential temperature reading across the water
connections. To ensure proper water flow, the
differential temperature should be between 10°F to
14°F for heat pumps in the cooling mode.
dissimilar metal fittings as they may corrode. If the
use of dissimilar metals is unavoidable, use
dielectric isolation at that connection point.
3. Supply and return run-outs usually join the heat
pump via short lengths of high pressure flexible
hose which are sound attenuators for both heat
pump operating noise and hydraulic pumping
noise. One end of the hose should have a swivel
fitting to facilitate removal for service. Hard piping
can also be brought directly to the heat pump. This
option is not recommended since no vibration or
noise attenuation can be accomplished. The hard
piping must have a union to facilitate heat pump
removal.
4. Make sure that threaded fittings are sealed. Teflon
tape can be used to provide a tight seal.
5. Supply and return shutoff valves are required at
each heat pump. The return valve is used for
balancing and should have a “memory stop” so that
it can always be closed off but can only be
reopened to the proper position for the flow
required.
Condensate Piping
1. Condensate piping can be steel, copper, or PVC.
Each unit includes a condensate connection.
2. The condensate disposal piping must be trapped.
Units are internally trapped. The piping must be
pitched away from the heat pump not less than ¼”
per foot. The unit is supplied with a male pipe fitting
(3/4”) to accommodate the condensate drain
connection.
3. Do not locate any point in the drain system above
the drain connection of any unit.
4. The condensate piping system must be vented at
its highest point.
MAMM-WSHP-IOM-1BA (February 2012)
7
Cleaning and Flushing
IMPORTANT:
Prior to first operation of B-vintage units, the water circulation system must be cleaned and flushed of all
construction dirt and debris. After the cleaning
and flushing has taken place, the initial connection
should have all valves wide open in preparation for
the water system flushing.
1. If the B-Vintage units are equipped with water shutoff valves, either electric or pressure operated, the
supply and return run-outs must be connected at
each heat pump location. This will prevent the introduction of dirt into the heat pump.
2. Fill the system at the city water makeup connection
with all air vents open. After filling, close all air
vents.
3. The contractor should start the main circulator with
the pressure reducing valve open. Check vents in
sequence to bleed off any trapped air, providing
circulation through all components of the system.
4. While circulating water, the contractor should check
and repair any leaks in the piping. Drains at the
lowest point(s) in the system should be opened for
the initial flush and blow down, making sure city
water fill valves are set to make up water at the
same rate. Check the pressure gauge at the pump
suction and manually adjust the makeup to hold the
same positive steady pressure both before and
after opening the drain valves. Flush should continue for at least two hours, or longer if required,
until the drain water is clear and clean.
5. Shut off supplemental heater (if applicable) and
circulator pump and open all drains and vents to
completely drain down the system. Short circuited
supply and return runouts should now be connected to the heat pump supply and return connections. Do not use sealers at the swivel flare connections of the hoses.
6. Refill the system with clean water. Test the water
using litmus paper for acidity and treat as required
to leave the water slightly alkaline (pH 7.5 to 8.5).
The specified percentage of antifreeze may also be
added at this time. Use commercial grade antifreeze designed for HVAC systems only. Do not
use automotive grade antifreeze.
7. Once the system has been filled with clean water
and antifreeze (if used), precaution should be taken
to protect the system from dirty water conditions.
Dirty water will result in system wide performance
degradation and solids may clog valves, strainers,
flow regulators, etc. Additionally, the heat exchangers may become clogged which reduces compressor service life or causes premature failure.
8. Set the loop water controller heat add setpoint to
70°F and the heat rejection setpoint to 85°F. Supply power to all motors and start the circulation
pumps. After full flow has been established through
all components including the heat exchanger
(regardless of season) and air has been vented
and loop temperatures have been stabilized, each
of the heat pumps will be ready for check, test and
start-up, and water balancing.
MAMM-WSHP-IOM-1BA (February 2012)
8
FANWALL TECHNOLOGY® Assembly
Fan / Cone Alignment
1. Temporarily attach the cone to the cell inlet using
the screws and washers provided, or slightly
loosen the screws holding the cone if already installed. Use a minimum of four screws for this step.
a. Refer to the fan wheel overlap drawings pro-
vided to determine where to set the wheel with
respect to the cone.
b. Adjust the amount of overlap by moving the
motor pedestal forward or backward to line up
the cone with the wheel (wheel/cone overlap is
designed to insert the cone 50% of the distance of the rolled shroud lip on the wheel).
Once you have the wheel approximately located, tighten the ½” pedestal bolts to 90ftlbs.
2. Center the cone in the wheel shroud.
a. The cone alignment can be a tedious process
as there are no tools that effectively work to
align the cone. It is a hands on process to align
the cone. Mammoth cones have a running
clearance of about 1/16" (see Figure 1).
b. Loosen the four screws that were used to hold
the cone for the depth alignment. Hold the
cone with one hand and with the other use a
drill to attach a screw to hold it in place. Feel
between the wheel inlet shroud and the cone
and set the gap to approximately 1/16" and
tighten the screw in that location (top of the
cone is usually the best place to start). You
should be able to move the cone about that
screw location, adjusting the cone on the left or
right until there is approximately a 1/16" gap.
c. Spin the wheel by hand at this point to check
for any clearance issues. If the wheel spins
clear, tighten the remaining screws on the
cone. Check that the wheel spins clear after
tightening each screw.
Figure 1—FANWALL® cone alignment
TYPICAL FAN-CONE
CLEARANCE
FIGURE 1
MAMM-WSHP-IOM-1BA (February 2012)
9
Start-up
1. Open all valves to full open position and turn on
power to the heat pump.
2. Set room temperature sensor for “Fan Only” operation by selecting “Off” at the system switch and
“On” at the fan switch. If “Auto” fan operation is selected, the fan will cycle with the compressor.
Check for proper air delivery.
3. Units have time delays which help protect the compressor(s) against short cycling. In the cooling
mode, after 30 seconds of operation, check the
discharge grilles for cool air delivery. Measure the
temperature difference between entering and leaving water. It should be approximately 1 ½ times
greater than the heating mode temperature difference.
4. In the heating mode, measure the temperature difference between entering and leaving air and entering and leaving water. With entering water of 60°
F to 80°F, leaving water should be 6°F to 12°F
cooler, and the air temperature rise through BVintage vertical units should not exceed 35°F. If
the leaving air temperature falls below 35°F, adjust
water flow to the unit to >3 gpm/ton to avoid freeze
damage to the unit.
5. Fill the p-trap with water to ensure that negative
pressure does not pull drain gases into the unit.
6. Check the elevation and cleanliness of the condensate line. If the air is too dry for sufficient dehumidification, slowly pour enough water into the condensate pan to ensure proper drainage.
7. If the unit does not operate, check the following
points:
a) Is supply voltage to the unit compatible?
b) If the unit operates but stops after a brief period:
i) Is there proper airflow? Check for dirty filter,
incorrect fan rotation or incorrect ductwork.
ii) Is there proper water flow rate within temperature limits? Check water balancing; backflush unit if dirt clogged.
iii) See troubleshooting guide on page 21 for
more tips.
MAMM-WSHP-IOM-1BA (February 2012)
10
Operating Limits
Environment
This equipment is designed for indoor installation only.
Sheltered locations such as attics, garages, etc., generally will not provide sufficient protection against ex-
Application Limits
WATER TEMPERATURES / Degrees F *
MINIMUM ENTERING WATER TEMPERATURE
MAXIMUM ENTERING WATER TEMPERATURE
* Application limits apply at or above standard flow rates specified for size of unit.
Application Limits
AIRTEMPERATURES/DegreesF*
MINIMUMAMBIENTAIRTEMPERATURE**
MAXIMUMAMBIENTAIRTEMPERATURE**
MINIMUMENTERINGAIRTEMPERATURE
MAXIMUMENTERINGAIR
TEMPERATURE
*Applicationlimitsapplyatorabovestandardflowratesspecifiedforsizeofunit.
**Minimumandmaximumambientconditionsapplytoductedsupplyandreturnunitsonly.
tremes in temperature and/or humidity, and equipment
performance, reliability, and service life may be adversely affected.
Standard range Low Temp Geothermal
COOLING HEATING COOLING HEATING
50˚ 50˚ 40˚ 25˚
110˚ 90˚ 110˚ 90˚
Standardrange LowTempGeothermal
COOLING HEATING COOLING HEATING
50˚ 50˚ 50˚ 50˚
110˚ 110˚ 110˚ 110˚
65˚ 50˚ 65˚ 40˚
100˚ 80˚ 100˚ 80˚
Additional Information For Initial Start-up Only
Standard Range Units
Units are designed to start-up in an ambient
temperature of 50°F (10°C), with entering air at 50°F
(10°C), with entering water at 70°F (21°C), with air and
water flow rates used in the ISO13256-1 rating test, for
initial start-up in winter.
Note: This is not a normal or continuous operating
condition. It is assumed that such a start-up is for the
purpose of bringing the building space up to occupancy
temperature.
Geothermal Range Units
Geothermal heat pump units are designed to start-up in
an ambient temperature of 50°F (10°C), with entering
air at 40°F (5°C), with entering fluid at 25°F (-4°C), with
air and water at flow rates used in the ISO 13256-1
rating test, for initial start-up in winter.
MAMM-WSHP-IOM-1BA (February 2012)
Note: This is not a normal or continuous operating
condition. It is assumed that such a start-up is for the
purpose of bringing the building space up to occupancy
temperature.
Operating voltages
208-230/1/60 . . . . . . . . . 197 volts min.; 253 volts max.
208-230/3/60. . . . . . . . . .197 volts min.; 253 volts max.
460/3/60. . . . . . . . . . . . . 414 volts min.; 506 volts max.
380/3/50. . . . . . . . . . . . . 342 volts min.; 418 volts max.
575/3/60. . . . . . . . . . . . . 515 volts min.; 632 volts max.
200-240/1/50. . . . . . . . . .216 volts min.; 264 volts max.
Note:
Voltages listed are to show voltage range. However,
units operating with over- or under-voltage conditions
for extended periods of time will experience premature
component failure. Three phase system imbalance
should not exceed 2%.
11
I/O 583
Mammoth I/O Zone 583 controller delivers powerful
control and communications features all in a compact,
economical package. Fully capable of operating in a
100% stand-alone control mode, the I/O Zone 583 can
connect to a Building Automation System (BAS) using
any of today’s most popular protocols, such as BACnet,
Modbus, N2, and LonTalk,. The I/O Zone 583 also supports communication to Mammoth line of intelligent
space sensors and keypad/display units.
Key Features and Benefits
I/O point count: 5 digital outputs (relayed), 8 inputs and 3 analog outputs.
Built-in protocol support: BACnet (ARCNET and MS/TP), Modbus RTU, and N2. Optional plug-in communica-
tions boards: LonTalk
On-board battery-backed real-time clock is standard, thus enabling full stand-alone scheduling capabilities as
well as historical trend data storage and alarm event time-stamping.•
Powerful, high-speed 16-bit processor with 1MB Flash memory and 512KB of battery-backed RAM - plenty of
room for even demanding and complex applications.
For standard CAV heat pumps requiring a modulating control points for a waterside economizer (WSE), hot gas
reheat (HGRH) or auxiliary heating.
MAMM-WSHP-IOM-1BA (February 2012)
12
I/O Zone 583 (RHT, CAV, NMUA) - Examples of I/O’s
Universal
Input
1 Supply Air Temperature (Monitor Only) Thermistor/Dry Contact
2 Condenser Leaving Water Temperature Thermistor/Dry Contact
3 Condenser Entering Water Temperature Thermistor/Dry Contact
4 Cooling Coil Leaving Air Temperature Sensor
5
6 Load Shead* Comp #1Q HP-5 Alarm* Comp r#2Q HP-5Alarm
7 Compr Lckt/Overflow Comp #1 HP-5 Alarm Comp #2 Alarm Thermistor/Dry Contact
8 Emergency Shut Down External Clock (Start) Dirty Filter (Switch Opt)
Space or Return Humidity
Jumper Setting
Thermistor/Dry Contact
Thermistor/Dry Contact
Thermistor/Dry Contact
Thermistor/Dry Contact
Rnet Jumper Setting
1
Analog
Output
Room/Return Air Temperature (RS Std) or
Room Air Temperature/Stet-Point/Override (RS-Pro, Optional)
N/A
Jumper Setting
N/A
1 Reheat** 0-10VDC
2 Water Side Economizer** 0-10VDC
3
Analog
Output
1 Supply Fan Start Dry Contact for 24 VAC
2 Compressor Call #1 Dry Contact for 24 VAC
3 Compressor Call #2 Dry Contact for 24 VAC
4 Reversing Valve Dry Contact for 24 VAC
5 Common Alarm Dry Contact for 24 VAC
Options are in italics. Common options are bolded.
Auxiliary Heat**
0-10VDC
Jumper Setting
N/A
* Cost add option must be ordered to get multiplexing board
** Requires DC relay for single stage, UCS for multi-stage, or actuator for modulating control
*** A minimum of one keypad display must be ordered per project to set required set-points
**** A protocol will be a cost add option
MAMM-WSHP-IOM-1BA (February 2012)
13
I/O Flex 6126
The standard factory-integrated DDC controller provides control flexibility that can be easily customized to
meet any sequence of operation needs. It is fully capable of operating in a 100% stand-alone mode or can
connect to a Building Automation System (BAS) using
any of today’s four leading protocols: BACnet, Modbus,
N2, and Lontalk. The base controller provides ample
input/output capacity, plus support for an expander
board if additional I/O capacity is required.
Key Features and Benefits
6160 I/O points: 6 digital outputs, 12 universal inputs, and 6 analog outputs.
8160 I/O points: 16 universal inputs, 8 digital outputs.
Optional built-in protocol support: BACnet® (ARCNET, MS/TP, and PTP modes), Modbus® (RTU and ASCII
modes supported), N2, or Lontalk®.
Powerful, high-speed 16-bit microprocessor with 1 MB Flash memory and 1 MB of battery-backed RAM
Built-in support through an Rnet port for control’s custom configurable keypad/display unit, BACview6 (4-line by
40 character per line display) for intelligent sensors.
For variable air volume (VAV), constant volume (CAV), and make-up air (MAU) applications.
MAMM-WSHP-IOM-1BA (February 2012)
14
Examples of I/O’s
INPUTS
Point Description
UD #1
UD #2
UD #3
UD #4 Contact, 0-10VDC,
UD #5 0-20MA
UD #6
UD #7
UD #8
UD #9
UD #10
UD #11
UD #12
Point Description
UO #1
UO #2
UO #3
UO #4
UO #5
UO#6
DO #1
DO #2
DO #3
DO #4
DO #5
DO #6
+Pulse
Room Air Temperature
RTD/Therm/Dry
Entering Air Temperature or Return Air Temperature (AiSE)
4-20mA, 0-10Vdc
Heating Source Control Signal
0-10 Vdc
Supply Fan VFD Control Signal
120 VAC
FORM C
Field-Lin (MWU or Open Min OA)
Common Alarm
Compressor Call #2
BMS Supply Air, Duct Static Reset or Room Air Temperature Setpoint
System Switch Emergency Shut Down Remote Start
High Static Low Static VFD in Bypass
Economizer Lockout Cooling Lockout Heating Lockout
Supply Fan Status Compressor Fault Condensate Overflow
Duct Static Pressure or Airflow Switch
Filter Static Pressure or Dirty Filter Switch #1
Outside Air Temperature (AiSE Only)
Condenser Water Temperature
Supply Air Temperature
OUTPUTS
Spare
Economizer Valve (WiSE)/Damper Control Signal (AiSE)
WiSE Bypass Valve Signal
Spare
Start Supply Fan
Start Condenser Pump or Switch Reversing Valve
Compressor Call #1
MAMM-WSHP-IOM-1BA (February 2012)
15
MAMMOTH DDC CONTROLS
Keypad
Locally access controllers and operational properties
with the easy-to-use BACview
into an Rnet connection on a 6126 controller and allows you to display and modify properties. The BACview
6 features a numeric keypad, directional keys, and
four programmable function keys. A large 4-line by 40character backlit LCD display is provided for easy reading even in poor lighting conditions. The device also
includes an alarm indicator light.
Key Features and Benefits
Compatible with all EPiC system controllers.
Flexible design allows panel or wall mounting; can be located up to 500 feet from the controller.
Hand-held version can be plugged into RS room temperature sensors.
Backlit LCD display enhances reading even in poor lighting conditions.
Customized menus for each product.
Password protection provides security.
One keypad can be used on different units/programs since the menus are part of the control program.
6 keypad/display. It plugs
MAMM-WSHP-IOM-1BA (February 2012)
16
General Maintenance
Normal maintenance on B-Vintage units is generally
limited to filter changes.
Air filter changes are required at regular intervals. The
time period between changes will depend upon the project requirements. It is suggested that the filter be
checked at 60-day intervals for the first year until experience is acquired.
The condensate drain pan should be checked annually
and cleaned and flushed as required.
Recording of performance measurements of volts,
amps, and water temperature differences (both heating
and cooling) is recommended. A comparison of logged
data with start-up and other annual data is useful as an
indicator of general equipment condition.
Parts and Service Support
Mammoth brand products are serviced by Authorized
Service Providers. For service support, contact Mammoth at 952-358-6618 or info@mammoth-inc.com.
Periodic lockouts almost always are caused by air or
water problems. The lockout (shutdown) of the heat
pump is a normal protective result. Check for dirt in the
water system, water flow rates, water temperatures,
airflow rates (may be dirty filter), and air temperatures.
If the lockout occurs in the morning following a return
from night setback, entering air below machine limits
may be the cause.
Parts for Mammoth brand products are available by
contacting your local representative. For assistance
locating your Mammoth representative, call 952-3586600 or e-mail info@mammoth-inc.com.
MAMM-WSHP-IOM-1BA (February 2012)
17
Troubleshooting
R-410A
The In’s and Out’s of R-410A
R-410A is a non-ozone depleting blend of two
Refrigerants — HFC-125 and HFC-32 in a fifty percent
mixture. Refrigerant 410A exhibits higher operating
pressure and refrigeration capacity than R-22.
Although R-410A is non-flammable at ambient temperature and atmosphere pressure, it can become
combustible under pressure when mixed with air.
(NOTE: R-410A should not be mixed with air under
pressure for leak testing. Pressure mixtures of dry nitrogen and R-410A can be used for leak testing.)
Lubrication
R410A should be used only with polyolester (POE) oil.
The HFC refrigerant components in R-410A will not be
compatible with mineral oil or alkylbenzene lubricants.
R-410A systems will be charged with the OEM recommended lubricant, ready for use with R-410A.
Troubleshooting Refrigeration Circuit
Symptom
Charge
Undercharge
System
(Possible Leak)
Overcharge System
Pressure
Low Air Flow
Heating
Low Air Flow
Cooling
Low Water Flow
Heating
Low Water Flow
Cooling
High Air Flow
Heating
High Air Flow
Cooling
High Water Flow
Heating
High Water Flow
Cooling
TXV Restricted High Low
Head
Pressure
Low Low Low High Low Low Low Low Pressure
High High High Normal Low
High High High
Low Low Low
Low Low
Normal Normal
High High High High Low Low High High Pressure
Low Low Low Low High Low Low Low Temp
Low High Normal High Low Low Normal High Pressure
Normal Low Low Low Normal Normal Low High Pressure
Low Low Low Low HIgh Normal Low Low Temp
Suction
Pressure
Compressor
Amp Draw
Low Low High Low High Low Temp
Normal
Low
Charging
Due to the zeotropic nature of R-410A, it should be
charged as a liquid. In situations where vapor is normally charged into a system, a valve should be installed in the charging line to flash the liquid to vapor
while charging.
WARNING!
It is very important to make certain that the recycle or
recovery equipment used is designed for R-410A. The
pressure of R-410A refrigerant is approximately 60
percent greater than that of R-22. Pressure gauges
require a range up to 800 PSIG high side and 250
PSIG low side. Recovery cylinders require a 400 PSIG
rating.
All Mammoth B-Vintage units are designed
for commercial use. Units are designed for the
cooling mode of operation and fail safe to heating.
Super
Heat
High
Normal
Low
Normal
High High Low Low
Subcooling
Low High Low High Pressure
Low Low Low Low Temp
Air
Temp
Differential
Normal
Low
Water
(Loops)
Temp
Differential
Normal High Pressure
Safety
Lock
Out
MAMM-WSHP-IOM-1BA (February 2012)
18
Performance Troubleshooting
Performance
Troubleshooting
Insufficient Capacity X X Dirty Filter Replace or clean
Not cooling or heating
properly
X X Leaky duct work
Unit doesn’t operate in
cooling
X X
X Defective reversing valve Perform RV touch test
X X
X X Unit undersized
X X
X X Inlet water to hot or cold Check load, loop sizing, loop backfill, ground moisture
High head pressure X
X
Heating Cooling Possible Cause Solution
X X Reduced or no air flow
X X Low refrigerant charge Check superheat and subcooling
Restricted metering device
Thermostat improperly
located
Scaling in waterside heat
exchanger
Reduced or no air flow in
heating
Reduced or no water flow
in cooling
Check for dirty air filter and clean or replace, Check fan motor operation
and airflow restriction. External static too high? Check static vs. blower
table
Check supply and return air temperatures at the unit and at distant duct
registers: If significantly different, duct leaks are present
Check superheat and subcooling– replace
Check location and for air drafts behind stat
Recheck loads & sizing. Check sensible, cooling load and heat pump capacity
Perform scaling check and clean if necessary
Check for dirty air filter and clean or replace. Check fan motor operation
and airflow restrictions. External static too high? Check static vs. blower
table
Check pump operation or valve operation/setting. Check water flow; adjust
to proper flow rate
X Inlet water to hot Check load, loop sizing, loop backfill, ground moisture
X
X
X X Unit overcharged Check superheat and subcooling
X X
Low suction pressure X
X
X
X
X X Insufficient charge Check for refrigerant leaks
Low discharge air
temperature in heating
X Poor performance See insufficient capacity
X To high of air flow Check fan motor speed selection and airflow
Air temperature out of
range in heating
Scaling in waterside heat
exchanger
Non-condensable in
system
Reduced water flow in
heating
Water temperature out of
range
Reduced air flow in cooling
Air temperature out of
range
Bring return air temp within design parameters
Perform scaling check and clean if necessary
Vacuum system, reweigh in charge
Check pump operation or valve operation/setting. Check water flow adjust
to proper flow rate
Bring water temp within design parameters
Check for dirty air filter and clean or replace. Check fan motor operation
and airflow restrictions. External static too high? Check static vs. blower
table
Too much cold vent air? Bring entering air temp within design
parameters.
MAMM-WSHP-IOM-1BA (February 2012)
19
UNIT CHECK-OUT SHEET
Customer Data
Customer Name ________________________________________ Date _________________________________________
Address ________________________________________________________________________________________________
Phone ________________________________________________ Unit Number___________________________________
Unit Nameplate Data
Make _______________________ Model Number ________________________ Serial Number _______________________
Compressor: RLA_______ LRA _______ Refrig, Charge (oz.) _______
Blower Motor(s): FLA (or NPA)________ HP __________
Maximum Fuse Size: (Amps) __________ Minimum Circuit Ampacity (Amps) __________________
Operating Conditions
Unit Conditions Cooling Mode Heating Mode Measured At:
Entering Air Temperature _____________ _____________ _________________________________
Leaving Air Temperature _____________ _____________ _________________________________
Entering Fluid Temperature _____________ _____________ n/a
Leaving Fluid Temperature _____________ _____________ n/a
Fluid Flow (gpm) _____________ _____________ n/a
Fluid Side Pressure Drop _____________ _____________ n/a
Compressor
Mode Cooling Heating
Suction Pressure (psig) _______ _______
Discharge Pressure (psig) _______ _______
Suction Temp (at compressor) _______ _______
Discharge Temp (at compressor) _______ _______
Suction Superheat (at compressor) _______ _______
Liquid Line Leaving Condenser Temp _______ _______
Liquid Subcooling _______ _______
Volts/Amps
Phase
L1 L2 L3
Compressor Volts _____ _____ _____
Compressor Amps _____ _____ _____
Blower Volts _____ _____ _____
Blower Amps _____ _____ _____
20
MAMM-WSHP-IOM-1BA (February 2012)
Notes
info@mammoth-inc.com
www.mammoth-inc.com
Mammoth, Inc. has a policy of continuous product improvement and reserves the right to
change design and specifications without notice.
© 2012 Mammoth, Inc.
MAMM-WSHP-IOM-1BA
February 2012
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