Mitsubishi MT300 User Manual

Installation
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65
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'10 • HM-T-149
Connection of external heat source
Connect an external heat source such as gas or oil boiler to
(XL8) (in) and (XL9) (out) on indoor unit (dimension G1
internal).Tousetheseconnections,thecorresponding“Punchout”
parts in the outer panel must be removed. Also cut off the
insulation above the connections.
<HMA100V, HMA100VM>
<HMS140V>
HMS140V doen’t have a port to connect external heat source but
MT300 and MT500 have it.
MT300
(Parallel thread, G1)
(Parallel thread, G1)
MT300
1880
30～45 (adjustable)
600
599
505050 250
308100
XL8
XL9
XL3
XL4
XL24
XL23
Symbol contents
XL3 Cold water R1 ext.

1

XL4 Hot water R1 ext.

1

XL8 External heat source in G1 int
XL9 External heat source out G1 int
XL23 Circulation supply R1 ext.

1

XL24 Circulation return R1 ext.

1

XL8
XL9
(Parallel screw, G1)
(Parallel screw, G1)
Outdoor unit installationIndoor unit installation
MT500
Waste exchanger part (HMA100V, HMA100VM
only)
Indoor unit has a waste at the exchange section. A hose routes
any waste water past the product’s electronics to minimise the
riskofdamage.Ifnecessary,ahoseextensioncanbeconnected.
Hose to waste
Connecting refrigerant pipes
See Installation manual for outdoor unit.
(Tapered thread, R1)
XL9
XL8
(Tapered thread, R1)

Mitsubishi MT300 Specifications

General

Brand	Mitsubishi
Model	MT300
Category	Heat Pump
Language	English