Mammoth 1/2-6 Tons User Manual

High Efficiency Single Circuit Horizontal and Vertical
Water Source Heat Pumps With R-410A

Installation, Operation and Maintenance Manual

Sizes: 006 to 072 — Horizontal
012 to 072 — Vertical
Model: A Vintage

MAMM-WSHP-IOM-1AA (September 2011)

P/N 71144914

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 560 ····································································································································· 12
I/O 583 ····································································································································· 14
I/O 6126···································································································································· 16
General Maintenance ··············································································································· 19
Parts and Service support ········································································································ 19
Troubleshooting ························································································································ 20
Performance Troubleshooting ································································································· 21
Unit check-out sheet ················································································································ 22

A Vintage Vertical
Size 009 to 072

MAMM-WSHP-IOM-1MA

A Vintage Horizontal
Size 006 to 072

2

Model Nomenclature

F -024- H- H- A

Voltage

BTU/hr Cooling

Unit Type Temperature Range Vintage

D = 208-230/1/60
E = 265/1/60
F = 208-230/3/60
G = 460/3/60
J = 380/3/50
K = 575/3/60
L = 220-240/1/50
S = 380/3/60
042 = 42,000
048 = 48,000

060 = 60,000
072 = 72,000

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.

06 = 6,000 V = Vertical H = Standard Range

009 = 9,000 H= Horizontal L = Low Temp Operation

012 = 12,000

015 = 15,000

018 = 18,000

024 = 24,000

030 = 30,000

036 = 36,000

“Mammoth” is a registered trademark of Mammoth, Inc.

©Mammoth, Inc. 2011. 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 [phone] or [e-mail]
for a warranty claim number.

MAMM-WSHP-IOM-1MA

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

Discharge Conversion—Horizontal Units

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.

All horizontal units from size 006 to 072 can be field
converted from straight discharge to side discharge.

1. Set the unit on a level surface.

2. Remove the blower access panel.

3. Remove the top panel.

4. Remove the screws that secure the panel where
blower is mounted.

5. Re-install the blower panel assembly for side dis­charge configuration (assembly will be flipped 180
degrees). See unit specification sheet for dimen­sional information.

6. Re-install the top of the unit.

7. Re-install the blower access panel where the
blower panel assembly was for straight-through
discharge.

8. After first operation, check all fasteners for tight­ness.

MAMM-WSHP-IOM-1MA

4

Unit Location and Clearances

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
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.

Horizontal unit clearances

Horizontal units have three access panels; one panel
for the blower, one for the electrical panel and one for
the compressor compartment. Horizontal unit filters are
removed from the right or left side with an option for
bottom removal.

Vertical units need to be accessed on three sides; two
panels for the compressor and blower, one for the elec­trical panel and compressor compartment. Vertical unit
filters are removed from the right or left side.

Vertical unit clearances

MAMM-WSHP-IOM-1MA

5

Mounting

Vertical 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..

Horizontal, ceiling-hung units are typically installed
above hallways and other corridors, away from the
occupied space for reduced sound and to allow easier
service access. Mounting brackets, rubber grommets,

Grommet detail

Hanger Bracket

Note: Rotate Brackets

90° And Tighten

bolts and washers are shipped in place on the unit.
The mounting brackets are designed to accept up to a
3/8-inch threaded rod (by others). A flat washer and
two nuts (both by others) should be used to mount the
unit on the ceiling attached threaded rods. When
installed, the unit should be slightly pitched toward the
condensate drain connection. See the unit submittal
drawing for the specific mounting location components.

Threaded Rod

(By Others)

Retaining nut

(by others)

Washer (by others) must cover

entire bottom of grommet

MAMM-WSHP-IOM-1MA

6

Ductwork and Attenuation

Discharge ductwork is normally used with A-vintage
horizontal and vertical single circuit units. Return air
ductwork may also be required.

Horizontal, or ceiling-mounted heat pumps virtually
always have discharge ductwork attached to the unit.
A flange is provided on the discharge to facilitate
attachment of the ductwork. Good design practice
requires a flexible connector between the flange and
supply ducting. This flexible collar isolates unit
vibration and noise from the supply duct, and simplifies
unit removal. The filter section is also supplied with a
flange to accommodate return ductwork. A flexible
connector should also be used to connect the unit to
the return ducting to attenuate unit sound levels and
allow ease of unit removal. Ducted returns are typically
used on acoustically sensitive applications. Return
ducting should run straight to the unit a minimum of 12”
to better distribute return air across the filters and coils.
For applications that are especially acoustically
sensitive, consider an acoustic kit that includes
additional unit lining and dampening material beneath
the entire unit.

Ductwork should be lined with an acoustic/ thermal
insulation a minimum of ½”. For sensitive installations,
use 1” insulation a minimum of five to 10 feet prior to
each diffuser. Directional changes in ductwork, such
as tees, elbows and dampers can cause airflow
turbulence and noise. Minimize the use of these items
where possible. Placing a straight run of duct about
the width between fittings will decrease turbulence and
associated noise. Diffusers located in the bottom of a
trunk duct pose acoustical problems. Volume control
dampers should be placed well upstream of any air
outlets.

Applications that have a single duct discharge, such as
hotels, should limit the velocity to a maximum of 600
fpm. Use a short run of duct with an elbow, if
necessary, without turning vanes. Return air grilles
should be located low on the sidewall and route up to
the ceiling plenum. An attenuator placed at the return
opening will provide added acoustical protection.

ASHRAE and SMACNA Suggested Supply Air Ducting

ASHRAE and SMACNA Suggested Return Air Ducting

For vertical units, 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.

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.

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).

MAMM-WSHP-IOM-1MA

V entilation Air

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.

7

Supply Piping

IMPORTANT:

Prior to first operation of A-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 heat pumps should be connected to supply and

2. The piping may be steel, copper, or PVC. Avoid



return 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.
Vertical units are internally trapped and horizontal
units must be externally 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 (5/8” for horizontal and 3/4” for vertical units)
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-1MA

8